Chicago to Philadelphia (ORD–PHL) — Airlines, Schedules & Connections

ORD Airport Page →
676 mi airlines charter/private 307/wk
On-time Some delays Frequent delays
Flight Schedule 100 flights Verified 51m ago
Also flown by charter / private operators: NetJets Aviation.
Nonstop Charter / private 1-Stop 2-Stop Hide separate tickets Hide overnight Hide codeshares
  Flight Airline AC Dep Arr Dur OTP Sched  
✈ Nonstop
AA2970+2
Seat map
AA American
7M8 Seat map
5:00 AM
CDT T3
8:15 AM
EDT
2h 15m
40%
M T W T F S S
Prices
AS6181cs
AS Alaska
7M8
5:00 AM
CDT T3
8:05 AM
EDT
2h 5m
51%
M T W T F S S
Prices
AA471+2
Seat map
AA American
321 Seat map
6:29 AM
CDT T3
9:47 AM
EDT
2h 18m
40%
M T W T F S S
Prices
NZ2737+3
NZ Air New Zealand
320
6:30 AM
CDT T1
9:38 AM
EDT
2h 8m
20%
M T W T F S S
Prices
UA2856
UA United
7M8
6:55 AM
CDT T1
10:02 AM
EDT
2h 7m
22%
M T W T F S S
Prices
Y42322cs
Y4 Volaris
32Q
7:25 AM
CDT T5
10:49 AM
EDT
2h 24m
22%
M T W T F S S
Prices
F92112+1
Seat map
F9 Frontier
321 Seat map
8:27 AM
CDT T5
11:39 AM
EDT
2h 12m
37%
M T W T F S S
Prices
AA1725
AA American
A21N
8:45 AM
CDT T3
11:52 AM
EDT
2h 7m
40%
M T W T F S S
Prices
NZ2745cs
NZ Air New Zealand
B39M
9:05 AM
CDT T1
12:23 PM
EDT
2h 18m
20%
M T W T F S S
Prices
UA729+1
UA United
7M9
9:05 AM
CDT T1
12:23 PM
EDT
2h 18m
22%
M T W T F S S
Prices
UA2052
UA United
7M9
11:20 AM
CDT T1
2:16 PM
EDT
1h 56m
22%
M T W T F S S
Prices
AC3004cs
Starts Sep 21
AC Air Canada
7M9
11:22 AM
CDT T1
2:40 PM
EDT
2h 18m
25%
M T W T F S S
Prices
NZ2747cs
NZ Air New Zealand
7M9
11:22 AM
CDT T1
2:40 PM
EDT
2h 18m
20%
M T W T F S S
Prices
UA2182+2
Starts Sep 24
UA United
7M9
11:25 AM
CDT T1
2:43 PM
EDT
2h 18m
22%
M T W T F S S
Prices
AA1743+1
Seat map
AA American
738 Seat map
11:40 AM
CDT T3
2:54 PM
EDT
2h 14m
40%
M T W T F S S
Prices
RJ7309cs
RJ Royal Jordanian
738
11:40 AM
CDT T3
2:51 PM
EDT
2h 11m
M T W T F S S
Prices
IB4772
Seat map
IB Iberia
738 Seat map
11:40 AM
CDT T3
2:54 PM
EDT
2h 14m
43%
M T W T F S S
Prices
IB4050
Seat map
IB Iberia
319 Seat map
1:26 PM
CDT T3
4:43 PM
EDT
2h 17m
43%
M T W T F S S
Prices
NZ2739cs
NZ Air New Zealand
7M8
2:30 PM
CDT T1
5:54 PM
EDT
2h 24m
20%
M T W T F S S
Prices
AC3002
Starts Sep 26
AC Air Canada
319
2:30 PM
CDT T1
5:54 PM
EDT
2h 24m
25%
M T W T F S S
Prices
UA2430+2
UA United
B38M
2:30 PM
CDT T2
5:54 PM
EDT
2h 24m
22%
M T W T F S S
Prices
LX3304cs
LX Swiss
7M9
2:30 PM
CDT T2
5:54 PM
EDT
2h 24m
39%
M T W T F S S
Prices
AA2840+2
Seat map
AA American
738 Seat map
2:53 PM
CDT T3
5:56 PM
EDT
2h 3m
40%
M T W T F S S
Prices
AA830
Seat map
AA American
319 Seat map
3:18 PM
CDT T3
6:18 PM
EDT
2h
40%
M T W T F S S
Prices
IB4409cs
IB Iberia
319
3:25 PM
CDT T3
6:42 PM
EDT
2h 17m
43%
M T W T F S S
Prices
MH9564cs
MH Malaysia
319
3:25 PM
CDT T3
6:42 PM
EDT
2h 17m
46%
M T W T F S S
Prices
UA2825
Starts Sep 24
UA United
738
4:00 PM
CDT T1
7:24 PM
EDT
2h 24m
22%
M T W T F S S
Prices
IB4517+2
IB Iberia
738
4:00 PM
CDT T3
7:19 PM
EDT
2h 19m
43%
M T W T F S S
Prices
UA1801
UA United
7M9
4:07 PM
CDT T1
7:31 PM
EDT
2h 24m
22%
M T W T F S S
Prices
MH9385cs
MH Malaysia
319
5:05 PM
CDT T3
8:22 PM
EDT
2h 17m
46%
M T W T F S S
Prices
CX7565cs
CX Cathay Pacific
738
5:07 PM
CDT T3
8:25 PM
EDT
2h 18m
M T W T F S S
Prices
AA1848+3
Seat map
AA American
319 Seat map
5:25 PM
CDT T3
8:42 PM
EDT
2h 17m
40%
M T W T F S S
Prices
AA1393
Seat map
AA American
738 Seat map
5:26 PM
CDT T3
8:34 PM
EDT
2h 8m
40%
M T W T F S S
Prices
AA597
Seat map
AA American
738 Seat map
5:48 PM
CDT T3
9:10 PM
EDT
2h 22m
40%
M T W T F S S
Prices
QR2754
Seat map
QR Qatar
738 Seat map
5:48 PM
CDT T3
9:10 PM
EDT
2h 22m
42%
M T W T F S S
Prices
UA1776+3
UA United
739
6:13 PM
CDT T3
9:27 PM
EDT
2h 14m
22%
M T W T F S S
Prices
NZ2741cs
NZ Air New Zealand
739
6:29 PM
CDT T1
9:43 PM
EDT
2h 14m
20%
M T W T F S S
Prices
CM2733cs
CM Copa
739
6:29 PM
CDT T1
9:43 PM
EDT
2h 14m
11%
M T W T F S S
Prices
AS6634
AS Alaska
321
6:40 PM
CDT T3
9:58 PM
EDT
2h 18m
51%
M T W T F S S
Prices
RJ7883cs
RJ Royal Jordanian
321
7:11 PM
CDT T3
10:23 PM
EDT
2h 12m
M T W T F S S
Prices
BA2408cs
BA British
321
7:30 PM
CDT T3
10:49 PM
EDT
2h 19m
29%
M T W T F S S
Prices
AY4156cs
AY Finnair
321
7:30 PM
CDT T3
10:49 PM
EDT
2h 19m
M T W T F S S
Prices
AA532+3
Seat map
AA American
321 Seat map
7:30 PM
CDT T3
10:49 PM
EDT
2h 19m
40%
M T W T F S S
Prices
AA3177+1
Seat map
AA American
738 Seat map
8:49 PM
CDT T3
11:59 PM
EDT
2h 10m
40%
M T W T F S S
Prices
NZ2743+2
NZ Air New Zealand
B39M
9:45 PM
CDT T1 Red-eye
12:59 AM+1
EDT
2h 14m
20%
M T W T F S S
Prices
UA3924
UA United
12:44 AM
EDT
1:38 AM
CDT
1h 54m
M T W T F S S
Prices
JL7433cs
JL Japan
738
5:43 AM
EDT TB
7:30 AM
CDT
2h 47m
M T W T F S S
Prices
AA2386+1
Starts Oct 5 Seat map
AA American
738 Seat map
5:43 AM
EDT
7:25 AM
CDT
2h 42m
39%
M T W T F S S
Prices
NZ2736cs
NZ Air New Zealand
B39M
6:25 AM
EDT TD
7:50 AM
CDT
2h 25m
M T W T F S S
Prices
NH7459cs
NH All Nippon
7M9
6:25 AM
EDT TD
7:50 AM
CDT
2h 25m
M T W T F S S
Prices
AC3009cs
AC Air Canada
B39M
6:25 AM
EDT TD
7:50 AM
CDT
2h 25m
M T W T F S S
Prices
UA660+3
UA United
7M9
6:25 AM
EDT TD
7:50 AM
CDT
2h 25m
M T W T F S S
Prices
AA3074+1
AA American
A21N
7:00 AM
EDT TB
8:36 AM
CDT
2h 36m
39%
M T W T F S S
Prices
RJ7696cs
RJ Royal Jordanian
321
7:36 AM
EDT TB
9:09 AM
CDT
2h 33m
M T W T F S S
Prices
CM2732cs
CM Copa
738
8:05 AM
EDT TD
9:34 AM
CDT
2h 29m
M T W T F S S
Prices
NZ2740cs
NZ Air New Zealand
7M9
8:20 AM
EDT TD
9:45 AM
CDT
2h 25m
M T W T F S S
Prices
AA2095+2
Seat map
AA American
319 Seat map
9:19 AM
EDT TC
10:56 AM
CDT
2h 37m
39%
M T W T F S S
Prices
AA1047
Starts Oct 5 Seat map
AA American
319 Seat map
9:21 AM
EDT
11:05 AM
CDT
2h 44m
39%
M T W T F S S
Prices
UA247
UA United
739
9:21 AM
EDT TD
10:28 AM
CDT
2h 7m
M T W T F S S
Prices
JL7673cs
JL Japan
319
9:33 AM
EDT TC
11:08 AM
CDT
2h 35m
M T W T F S S
Prices
UA1811+3
Starts Sep 24
UA United
739
9:35 AM
EDT TD
11:00 AM
CDT
2h 25m
M T W T F S S
Prices
LX3305cs
LX Swiss
320
10:34 AM
EDT TD
11:59 AM
CDT
2h 25m
M T W T F S S
Prices
NZ2744cs
NZ Air New Zealand
320
10:34 AM
EDT TD
11:59 AM
CDT
2h 25m
M T W T F S S
Prices
AA865
Seat map
AA American
738 Seat map
10:38 AM
EDT
12:16 PM
CDT
2h 38m
39%
M T W T F S S
Prices
JL8358+2
JL Japan
738
10:38 AM
EDT TB
12:16 PM
CDT
2h 38m
M T W T F S S
Prices
UA2207+4
Starts Sep 24
UA United
738
11:04 AM
EDT TD
12:29 PM
CDT
2h 25m
M T W T F S S
Prices
AA2307
Starts Oct 5 Seat map
AA American
789 Seat map
11:35 AM
EDT
1:10 PM
CDT
2h 35m
39%
M T W T F S S
Prices
CM2731cs
CM Copa
739
11:38 AM
EDT TD
1:06 PM
CDT
2h 28m
M T W T F S S
Prices
F92111+1
Seat map
F9 Frontier
32Q Seat map
11:54 AM
EDT TE
1:30 PM
CDT
2h 36m
M T W T F S S
Prices
Y42321cs
Y4 Volaris
32Q
11:54 AM
EDT TE
1:30 PM
CDT
2h 36m
M T W T F S S
Prices
UA2315
UA United
738
12:20 PM
EDT TD
1:58 PM
CDT
2h 38m
M T W T F S S
Prices
AS6604
Seat map
AS Alaska
738 Seat map
12:42 PM
EDT
2:15 PM
CDT
2h 33m
M T W T F S S
Prices
CX7524cs
CX Cathay Pacific
738
12:42 PM
EDT TB
2:15 PM
CDT
2h 33m
M T W T F S S
Prices
AA1854+1
Seat map
AA American
32Q Seat map
1:18 PM
EDT
3:08 PM
CDT
2h 50m
39%
M T W T F S S
Prices
NZ2738cs
NZ Air New Zealand
739
1:30 PM
EDT TD
2:55 PM
CDT
2h 25m
M T W T F S S
Prices
UA2784+1
UA United
739
1:30 PM
EDT TD
2:55 PM
CDT
2h 25m
M T W T F S S
Prices
AS4451+1
Seat map
AS Alaska
738 Seat map
2:00 PM
EDT TC
3:33 PM
CDT
2h 33m
M T W T F S S
Prices
BA1819
Starts Sep 28 Seat map
BA British
738 Seat map
2:32 PM
EDT TA
4:10 PM
CDT
2h 38m
M T W T F S S
Prices
AA821
Seat map
AA American
738 Seat map
2:32 PM
EDT TA
4:10 PM
CDT
2h 38m
39%
M T W T F S S
Prices
RJ7988cs
RJ Royal Jordanian
319
3:20 PM
EDT TB
5:01 PM
CDT
2h 41m
M T W T F S S
Prices
AS4257cs
AS Alaska
319
3:20 PM
EDT
5:01 PM
CDT
2h 41m
M T W T F S S
Prices
MH9627cs
MH Malaysia
319
3:20 PM
EDT TB
5:01 PM
CDT
2h 41m
M T W T F S S
Prices
AA470+4
Seat map
AA American
319 Seat map
4:04 PM
EDT
5:44 PM
CDT
2h 40m
39%
M T W T F S S
Prices
AC3007cs
AC Air Canada
738
5:01 PM
EDT TD
6:31 PM
CDT
2h 30m
M T W T F S S
Prices
UA308+4
UA United
320
5:01 PM
EDT TD
6:32 PM
CDT
2h 31m
M T W T F S S
Prices
NZ2742cs
NZ Air New Zealand
738
5:01 PM
EDT TD
6:31 PM
CDT
2h 30m
M T W T F S S
Prices
AS4160+1
Seat map
AS Alaska
738 Seat map
5:40 PM
EDT
7:26 PM
CDT
2h 46m
M T W T F S S
Prices
AA753
Starts Oct 5 Seat map
AA American
738 Seat map
5:42 PM
EDT
7:30 PM
CDT
2h 48m
39%
M T W T F S S
Prices
AY3607cs
AY Finnair
738
5:49 PM
EDT TC
7:39 PM
CDT
2h 50m
M T W T F S S
Prices
AA2041+3
Seat map
AA American
738 Seat map
5:49 PM
EDT TB
7:39 PM
CDT
2h 50m
39%
M T W T F S S
Prices
MH9510cs
MH Malaysia
738
5:55 PM
EDT TA
7:46 PM
CDT
2h 51m
M T W T F S S
Prices
UA2665+1
UA United
B38M
6:56 PM
EDT TD
8:26 PM
CDT
2h 30m
M T W T F S S
Prices
NZ2746cs
NZ Air New Zealand
738
6:56 PM
EDT TD
8:26 PM
CDT
2h 30m
M T W T F S S
Prices
F92113
Seat map
F9 Frontier
32Q Seat map
7:36 PM
EDT TE
8:51 PM
CDT
2h 15m
M T W T F S S
Prices
AA490+5
Seat map
AA American
738 Seat map
7:39 PM
EDT
9:30 PM
CDT
2h 51m
39%
M T W T F S S
Prices
IB4496cs
IB Iberia
B38M
8:51 PM
EDT TC
10:30 PM
CDT
2h 39m
M T W T F S S
Prices
IB4686+1
Seat map
IB Iberia
7M8 Seat map
8:55 PM
EDT
10:35 PM
CDT
2h 40m
M T W T F S S
Prices
AA2155
AA American
B38M
8:55 PM
EDT TA
10:35 PM
CDT
2h 40m
39%
M T W T F S S
Prices
AA372
Starts Oct 4 Seat map
AA American
319 Seat map
9:10 PM
EDT
10:59 PM
CDT
2h 49m
39%
M T W T F S S
Prices
AA2668
Seat map
AA American
321 Seat map
10:20 PM
EDT TC
11:56 PM
CDT
2h 36m
39%
M T W T F S S
Prices

No flights match your filters.

No scheduled airline flights on this route — it's flown by charter / private operators (). No nonstop flights on this route. connecting options below.

✦ 1-Stop connections via 10 hubs
PIT Pittsburgh 3h 48m AAACAS AABAEI Pittsburgh (PIT) to Philadelphia flights
GRR Grand Rapids 3h 49m AAASBA AAG4QR Grand Rapids (GRR) to Philadelphia flights
MDT Harrisburg 3h 54m AAASNZ AA Harrisburg (MDT) to Philadelphia flights
DTW Detroit 3h 57m AAACAF AAAFAM Detroit (DTW) to Philadelphia flights
SCE State College 4h 2m NZUA AAASQR State College (SCE) to Philadelphia flights
IND Indianapolis 4h 3m AAACAS AAEIQR Indianapolis (IND) to Philadelphia flights
IAD Dulles 4h 6m ACAVAZ ACAVCM Dulles (IAD) to Philadelphia flights
CMH Columbus 4h 6m AAASAY AABAEI Columbus (CMH) to Philadelphia flights
DCA Washington 4h 10m AAASAY AAASBA Washington (DCA) to Philadelphia flights
SYR Syracuse 4h 11m AAACAS AAQR Syracuse (SYR) to Philadelphia flights
1-STOP More options, longer trips
2-STOP Loading... Reach the hardest destinations
Chicago to Philadelphia
6 carriers, 307 flights/week nonstop.
6 Airlines 676 mi 2h 17m nonstop +1h ahead

ORD–PHL is served by 6 airlines with nonstop service. American Airlines, United Airlines and Qatar Airways lead the route. The flight covers 676 miles in approximately 2h 17m. Beyond nonstop, 1-stop connecting options are also available.

Airline Landscape

All carriers operating nonstop ORD–PHL service, compared side by side.
Airline Freq/wk Aircraft Duration Dep OTP Alliance Codeshares
AA American Airlines Also: AS, AY, BA, CX, IB, MH, RJ 77 319, 321, 738, 7M8, A21N 2h-2h22 38% Oneworld AS, AY, BA, CX, IB, MH, RJ
UA United Airlines Also: AC, CM, EK, LX, NZ 56 738, 739, 7M8, 7M9, B38M 1h56-2h24 38% Star Alliance AC, CM, EK, LX, NZ
QR Qatar Airways 7 738 2h22 38% Oneworld
F9 Frontier Also: Y4 5 321 2h12 38% Y4
DL Delta Air Lines 0 38% SkyTeam
SY Sun Country Airlines 0 38%
Aircraft on this route
319 Airbus A319 – AA, AC, IB, MH
320 Airbus A320 – NZ
321 Airbus A321 – AA, AS, AY, BA, F9, RJ
32Q Airbus A321neo – Y4
738 Boeing 737-800 – AA, CX, IB, QR, RJ, UA
739 Boeing 737-900 – CM, NZ, UA
7M8 Boeing 737 MAX 8 – AA, AS, NZ, UA
7M9 Boeing 737 MAX 9 – AC, LX, NZ, UA
A21N Airbus A321neo – AA
B38M Boeing 737 MAX 8 – UA
B39M Boeing 737 MAX 9 – NZ
Alliance coverage
Oneworld: AA + QR (84 flights/wk, 58%)
Star Alliance: UA (56 flights/wk, 39%)
Unaffiliated: F9 + SY (5 flights/wk, 3%)
SkyTeam: DL (0 flights/wk, 0%)
OTP based on airport-level delay snapshots. Duration ranges reflect seasonal/directional variation.

Weekly Schedule Pattern

Nonstop flight frequency by day of week, ORD to PHL direction.
Mon
44
flights
Tue
43
flights
Wed
42
flights
Thu
44
flights
Fri
44
flights
Sat
45
flights
Sun
45
flights
Departure time distribution
12 AM6 AM12 PM6 PM12 AM
Morning departures
Afternoon/evening departures
45
Nonstop flights
307
Outbound / wk
355
Return / wk

Connection Landscape

Beyond nonstop. 1-stop and 2-stop options for ORD to PHL.
1-STOP
One-Stop Connections
106
Hubs
~3h
Fastest
~31h
Longest
Verified with published schedule alignment and minimum connection time.
2-STOP
Two-Stop Connections
5,546
Candidates
Two-stop connections loaded in the connections tab above.
Connections computed from published schedules with minimum connection time verification. Use the interactive explorer above the fold to filter by airline, tier, and layover time.

On-Time Performance

What to expect at each end of your journey.
Outbound
ORD → PHL
38%
Frequent delays expected. Consider flexible booking.
Departing
38%
Arriving
84%
Return
PHL → ORD
68%
Moderate delays possible. Allow buffer time.
Departing
68%
Arriving
85%
OTP = percentage of flights arriving within 15 min of schedule. Based on airport-level delay snapshots. ORD delays → PHL delays →

Other ways to reach Philadelphia from Chicago

Nearby airports with service to Philadelphia International Airport.
Metric ORD→PHL MDW→PHL GYY→PHL
Distance from ORD 15 mi 36 mi
Nonstop airlines 6 12 1
Weekly flights 307 61
Flight time 2h 17m 1h 35m 1h 29m
Departure OTP 38%
Airports within 200 miles of ORD with service to Philadelphia International Airport.

Travel Essentials

Practical planning for this route.
Time Difference
+1h
Philadelphia is 1 hour ahead of Chicago.
ORD: CDT · PHL: EDT

When it's 6:00 PM in Chicago, it's 7:00 PM in Philadelphia.
Distance & Flight Time
676 mi / 1,088 km
Nonstop flight time is approximately 2h 17m gate to gate.
Getting to ORD

CTA Blue Line runs 24/7 from downtown Loop stations to O'Hare (45 min, $5). Pace buses serve suburbs. Ride-shares cost $35–55 from downtown depending on traffic; add 30+ minutes during rush hour on the Kennedy Expressway.Economy parking lots E/F connect via ATS people mover. Terminal 5 (international) is separate from Terminals 1–3; allow extra time for inter-terminal transfers.

Getting from PHL

SEPTA Airport Line from the terminal to Center City takes 25–30 minutes ($8). Trains run every 30 minutes (5am to midnight) to 30th Street, Suburban, and Jefferson stations; all with connections to the subway and regional rail network. Buy tickets at platform machines.Taxis to Center City cost $28–35 (flat rate). Ride-shares to Center City run $22–35. For New York City, the Bolt Bus and Greyhound stop near 30th Street Station, or take NJ Transit to New York Penn Station (connecting from 30th Street). Amtrak also departs 30th Street Station for New York in 65 minutes.

Philadelphia Climate

Humid continental climate on the Delaware River. Winters (December–March) are cold (−2 to 5°C) with snow and ice. Philadelphia sits in the I-95 "snow corridor" and receives significant nor'easter snowfall several times per winter. PHL has solid de-icing capacity, but major storms cause multi-hour and multi-day disruptions.

Summers are hot and humid (28–34°C) with afternoon thunderstorms that cause frequent delays June through August. Spring and fall are transitional with variable conditions. Fog along the Delaware is occasional in fall and early winter mornings.

ORD–PHL Quick Facts

Key statistics for the Chicago to Philadelphia route.
Route details
Distance676 mi / 1,088 km
Flight time2h 17m
Time difference+1 hour
Airlines (nonstop)6
Weekly flights307 out / 355 return
1-stop connectionsAvailable
Origin: ORD
IATA / ICAOORD / KORD
TimezoneAmerica/Chicago
Passengers/yr80.0M
Elevation680 ft / 207 m
Destination: PHL
IATA / ICAOPHL / KPHL
TimezoneAmerica/New_York
Passengers/yr30.2M
Elevation36 ft / 11 m

Frequently Asked Questions

Common questions about ORD to PHL flights.
Nonstop flights from Chicago O'Hare International Airport to Philadelphia International Airport take about 2h 17m gate to gate. The route covers 676 miles.
6 airlines operate flights from ORD to PHL: American Airlines, United Airlines, Qatar Airways, Frontier, and others.
This route has frequent daily service. Check the schedule above for departure days and times in each direction.
Yes, 1-stop connections are available, ranked by layover time. Common connecting points include Pittsburgh, Gerald R. Ford and Harrisburg.
On a single ticket, yes. Your bags are checked through to PHL and move between planes without you. On two separate tickets you collect your bags at the connecting airport and recheck them, so build in extra layover time.
Philadelphia is 1 hour ahead of Chicago.
Yes, return flights from PHL to ORD are available. Use the direction toggle at the top to view the return schedule.
Nearby alternatives include MDW, GYY and RFD. See the Alternatives section for a full comparison.
Click the 'Search Flights' button to check availability and prices on Google Flights. You can also compare airlines and schedules on this page to find the best option.
See the On-Time Performance section for the latest delay data at both airports. This shows departure and arrival reliability to help you plan.
Route data is updated regularly from official airline schedules. On-time performance data comes from recent airport delay snapshots.
American Airlines dominates ORD-PHL and operates from Terminal 3 at O'Hare. United uses Terminal 1. At Philadelphia International, American uses Terminals B and C. United uses Terminal A-East. Both airports are American hubs, making ORD-PHL essentially an inter-hub segment. PHL has a unique linear terminal configuration running A-west through F; terminals are connected airside within the secure zone.
ORD-PHL combines two of the more delay-prone airports in the US system. O'Hare generates summer convective and winter snow delays; Philadelphia generates fog-related delays in fall and spring, and carries airspace congestion from its position in the busy Northeast corridor. Combined, the on-time average for this segment trails the national average. Late afternoon departures from ORD arrive into PHL peak traffic, compounding the risk.
United operates ORD-PHL as well. Frontier runs periodic service. Spirit served this market historically. American carries the overwhelming majority of seats, consistent with its dual-hub position at both ends. The segment is 770 miles and block time is 2 hours. Passengers with flexibility might consider AmTrak Keystone or Northeast Regional as a PHL-to-Chicago alternative via New York if schedule permits, though rail adds 18+ hours.

Chicago O'Hare to Philadelphia: American's Inter-Hub Corridor

ORD-PHL connects two of American Airlines' primary hub airports, making it one of the more operationally significant segments in American's network. American carries the majority of seats with 8-12 daily departures. United adds 2-4. Flight time is 2 hours. The route serves connecting passengers flowing between American's Atlantic and European network at PHL and its Midwest and mountain west network at ORD. Point-to-point Chicago-Philadelphia travelers represent a smaller portion of the passenger mix. Block time varies from 1 hour 50 minutes to 2 hours 15 minutes depending on direction and altitude routing.

Delay Profile and Northeast Corridor Congestion

Philadelphia sits at the southern edge of the Northeast corridor air traffic management zone. Airspace saturation from the Boston-New York-Washington triangle affects PHL arrival sequencing during peak periods even when Philadelphia's local weather is clear. O'Hare contributes its own delay exposure year-round. The combination places ORD-PHL among the segments where afternoon delay propagation is most consistent. Philadelphia International connects to Center City via SEPTA Airport Regional Rail Line in 25 minutes for $8. O'Hare connects to downtown Chicago via the CTA Blue Line in 45 minutes for $5.