Atlanta to Chicago (ATL–ORD) — Airlines, Schedules & Connections

ATL Airport Page →
607 mi airlines 354/wk
On-time Some delays Frequent delays
Flight Schedule 111 flights Verified 12h ago
Nonstop 1-Stop 2-Stop Hide separate tickets Hide overnight
  Flight Airline AC Dep Arr Dur OTP Sched  
AA928
AA American
319
6:00 AM
EDT TN
7:19 AM
CDT
2h 19m
M T W T F S S
Prices
AA3671
AA American
E70
6:00 AM
EDT TN
7:21 AM
CDT
2h 21m
M T W T F S S
Prices
BA6693
BA British
319
6:00 AM
EDT TN
7:19 AM
CDT
2h 19m
M T W T F S S
Prices
BA1923
BA British
319
6:36 AM
EDT TN
7:59 AM
CDT
2h 23m
M T W T F S S
Prices
BA1658
BA British
319
7:00 AM
EDT TN
8:29 AM
CDT
2h 29m
M T W T F S S
Prices
AA2132
AA American
319
7:00 AM
EDT TN
8:29 AM
CDT
2h 29m
M T W T F S S
Prices
F91441
F9 Frontier
A20N
7:11 AM
EDT TN
8:10 AM
CDT
1h 59m
M T W T F S S
Prices
DL1178
DL Delta
739
7:25 AM
EDT TS
8:30 AM
CDT
2h 5m
M T W T F S S
Prices
AA3311
AA American
319
7:46 AM
EDT TN
9:05 AM
CDT
2h 19m
M T W T F S S
Prices
UA1554
UA United
738
8:15 AM
EDT TN
9:34 AM
CDT
2h 19m
M T W T F S S
Prices
AC3303
AC Air Canada
738
8:15 AM
EDT TN
9:33 AM
CDT
2h 18m
M T W T F S S
Prices
UA2070
UA United
738
8:15 AM
EDT TN
9:33 AM
CDT
2h 18m
M T W T F S S
Prices
AC3304
AC Air Canada
739
8:15 AM
EDT TN
9:33 AM
CDT
2h 18m
M T W T F S S
Prices
DL1147
DL Delta
739
9:05 AM
EDT TS
10:06 AM
CDT
2h 1m
M T W T F S S
Prices
AM4235
AM Aeromexi
738
9:08 AM
EDT TS
10:14 AM
CDT
2h 6m
M T W T F S S
Prices
AS4433
AS Alaska
E75
10:17 AM
EDT TN
11:38 AM
CDT
2h 21m
M T W T F S S
Prices
BA1671
BA British
E75
11:06 AM
EDT TN
12:25 PM
CDT
2h 19m
M T W T F S S
Prices
CX7619
CX Cathay Pacific
E70
11:06 AM
EDT TN
12:25 PM
CDT
2h 19m
M T W T F S S
Prices
AS4413
AS Alaska
E75
11:06 AM
EDT TN
12:25 PM
CDT
2h 19m
M T W T F S S
Prices
AC3305
AC Air Canada
320
11:28 AM
EDT TN
12:47 PM
CDT
2h 19m
M T W T F S S
Prices
UA745
UA United
737
11:28 AM
EDT TN
12:46 PM
CDT
2h 18m
M T W T F S S
Prices
AM4478
AM Aeromexi
739
12:31 PM
EDT TS
1:34 PM
CDT
2h 3m
M T W T F S S
Prices
DL1477
DL Delta
321
12:40 PM
EDT TS
1:48 PM
CDT
2h 8m
M T W T F S S
Prices
BA1672
BA British
E75
12:44 PM
EDT TN
2:05 PM
CDT
2h 21m
M T W T F S S
Prices
AA3769
AA American
E70
12:50 PM
EDT TN
1:59 PM
CDT
2h 9m
M T W T F S S
Prices
UA1396
UA United
73G
1:33 PM
EDT TN
2:55 PM
CDT
2h 22m
M T W T F S S
Prices
BA1818
BA British
E75
3:19 PM
EDT TN
4:40 PM
CDT
2h 21m
M T W T F S S
Prices
AA3422
AA American
E75
3:19 PM
EDT TN
4:40 PM
CDT
2h 21m
M T W T F S S
Prices
GF4226
GF Gulf
E70
3:19 PM
EDT TN
4:40 PM
CDT
2h 21m
M T W T F S S
Prices
AS4024
AS Alaska
E75
3:19 PM
EDT TN
4:40 PM
CDT
2h 21m
M T W T F S S
Prices
BA1723
BA British
E75
3:19 PM
EDT TN
4:40 PM
CDT
2h 21m
M T W T F S S
Prices
BA2425
BA British
E75
3:22 PM
EDT TN
4:43 PM
CDT
2h 21m
M T W T F S S
Prices
AA2737
AA American
319
3:30 PM
EDT TN
4:51 PM
CDT
2h 21m
M T W T F S S
Prices
AC3300
AC Air Canada
319
3:42 PM
EDT TN
5:03 PM
CDT
2h 21m
M T W T F S S
Prices
AF2806
AF Air France
739
3:45 PM
EDT TS
4:49 PM
CDT
2h 4m
M T W T F S S
Prices
EK6007
EK Emirates
319
3:45 PM
EDT TN
5:05 PM
CDT
2h 20m
M T W T F S S
Prices
AF2316
AF Air France
739
3:45 PM
EDT TS
4:49 PM
CDT
2h 4m
M T W T F S S
Prices
AF2103
AF Air France
739
3:45 PM
EDT TS
4:49 PM
CDT
2h 4m
M T W T F S S
Prices
UA516
UA United
320
3:45 PM
EDT TN
4:50 PM
CDT
2h 5m
M T W T F S S
Prices
AM3281
AM Aeromexi
738
3:47 PM
EDT TS
4:50 PM
CDT
2h 3m
M T W T F S S
Prices
DL2738
DL Delta
320
4:38 PM
EDT TS
5:59 PM
CDT
2h 21m
M T W T F S S
Prices
DL2879
DL Delta
320
5:42 PM
EDT TS
6:53 PM
CDT
2h 11m
M T W T F S S
Prices
AM4074
AM Aeromexi
739
6:15 PM
EDT TS
7:19 PM
CDT
2h 4m
M T W T F S S
Prices
F91595
F9 Frontier
A21N
6:21 PM
EDT TN
7:52 PM
CDT
2h 31m
M T W T F S S
Prices
UA1046
UA United
73G
6:50 PM
EDT TN
8:12 PM
CDT
2h 22m
M T W T F S S
Prices
AC3301
AC Air Canada
738
6:57 PM
EDT TN
8:17 PM
CDT
2h 20m
M T W T F S S
Prices
AM3188
AM Aeromexi
321
7:05 PM
EDT TS
8:16 PM
CDT
2h 11m
M T W T F S S
Prices
AS4534
AS Alaska
E75
7:57 PM
EDT TN
9:23 PM
CDT
2h 26m
M T W T F S S
Prices
AA4703
AA American
E75S
7:57 PM
EDT TN
9:23 PM
CDT
2h 26m
M T W T F S S
Prices
AS4712
AS Alaska
E75
7:57 PM
EDT TN
9:23 PM
CDT
2h 26m
M T W T F S S
Prices
AA1855
AA American
319
8:09 PM
EDT TN
9:34 PM
CDT
2h 25m
M T W T F S S
Prices
AM3591
AM Aeromexi
739
8:10 PM
EDT TS
9:10 PM
CDT
2h
M T W T F S S
Prices
DL1139
DL Delta
739
8:10 PM
EDT TS
9:10 PM
CDT
2h
M T W T F S S
Prices
AF2097
AF Air France
739
8:10 PM
EDT TS
9:10 PM
CDT
2h
M T W T F S S
Prices
F93397
F9 Frontier
A21N
9:15 PM
EDT TN
10:39 PM
CDT
2h 24m
M T W T F S S
Prices
NK351
NK Spirit
32Q
9:17 PM
EDT TN
10:29 PM
CDT
2h 12m
M T W T F S S
Prices
DL1199
DL Delta
738
10:54 PM
EDT TS
11:56 PM
CDT
2h 2m
M T W T F S S
Prices
CX3291
CX Cathay Pacific
74N
1:10 AM
CDT
4:10 AM
EDT
2h
M T W T F S S
Prices
AM4610
AM Aeromexi
739
5:25 AM
CDT T5
8:34 AM
EDT
2h 9m
M T W T F S S
Prices
F91596
F9 Frontier
A20N
5:30 AM
CDT T5
8:47 AM
EDT
2h 17m
M T W T F S S
Prices
DL1264
DL Delta
738
5:30 AM
CDT T5
8:32 AM
EDT
2h 2m
M T W T F S S
Prices
AS4433
AS Alaska
E75
6:40 AM
CDT T3
9:47 AM
EDT
2h 7m
M T W T F S S
Prices
AM4011
AM Aeromexi
738
6:45 AM
CDT T5
9:58 AM
EDT
2h 13m
M T W T F S S
Prices
UA2249
UA United
320
7:15 AM
CDT T3
10:20 AM
EDT
2h 5m
M T W T F S S
Prices
AC3294
AC Air Canada
319
7:20 AM
CDT T1
10:25 AM
EDT
2h 5m
M T W T F S S
Prices
DL1452
DL Delta
321
8:15 AM
CDT T5
11:15 AM
EDT
2h
M T W T F S S
Prices
AM4042
AM Aeromexi
321
8:15 AM
CDT T5
11:15 AM
EDT
2h
M T W T F S S
Prices
DL1247
DL Delta
739
8:43 AM
CDT T5
11:34 AM
EDT
1h 51m
M T W T F S S
Prices
AA3449
AA American
E70
9:05 AM
CDT T3
12:07 PM
EDT
2h 2m
M T W T F S S
Prices
AC3293
AC Air Canada
738
9:15 AM
CDT T1
12:20 PM
EDT
2h 5m
M T W T F S S
Prices
AC3296
AC Air Canada
738
9:15 AM
CDT T1
12:20 PM
EDT
2h 5m
M T W T F S S
Prices
UA2225
UA United
738
9:15 AM
CDT T1
12:20 PM
EDT
2h 5m
M T W T F S S
Prices
AF2712
AF Air France
739
9:50 AM
CDT T5
12:48 PM
EDT
1h 58m
M T W T F S S
Prices
DL1178
DL Delta
739
9:50 AM
CDT T5
12:48 PM
EDT
1h 58m
M T W T F S S
Prices
AM3921
AM Aeromexi
738
9:52 AM
CDT T5
1:04 PM
EDT
2h 12m
M T W T F S S
Prices
AC3292
AC Air Canada
737
10:30 AM
CDT T2
1:38 PM
EDT
2h 8m
M T W T F S S
Prices
UA2605
UA United
B38M
10:35 AM
CDT T1
1:40 PM
EDT
2h 5m
M T W T F S S
Prices
DL1147
DL Delta
739
11:16 AM
CDT T5
2:16 PM
EDT
2h
M T W T F S S
Prices
AM3667
AM Aeromexi
738
11:18 AM
CDT T5
2:19 PM
EDT
2h 1m
M T W T F S S
Prices
AA2737
AA American
319
11:40 AM
CDT T3
2:50 PM
EDT
2h 10m
M T W T F S S
Prices
AA3422
AA American
E75
11:45 AM
CDT T3
2:47 PM
EDT
2h 2m
M T W T F S S
Prices
AC7305
AC Air Canada
763
1:55 PM
CDT
4:50 PM
EDT
1h 55m
M T W T F S S
Prices
AC3295
AC Air Canada
739
2:25 PM
CDT T1
5:31 PM
EDT
2h 6m
M T W T F S S
Prices
AM3185
AM Aeromexi
738
2:25 PM
CDT T5
5:28 PM
EDT
2h 3m
M T W T F S S
Prices
DL1884
DL Delta
738
2:25 PM
CDT T5
5:28 PM
EDT
2h 3m
M T W T F S S
Prices
UA356
UA United
319
2:32 PM
CDT T1
5:38 PM
EDT
2h 6m
M T W T F S S
Prices
AM4241
AM Aeromexi
738
2:38 PM
CDT T5
5:33 PM
EDT
1h 55m
M T W T F S S
Prices
AM3924
AM Aeromexi
739
2:46 PM
CDT T5
5:51 PM
EDT
2h 5m
M T W T F S S
Prices
AM3339
AM Aeromexi
321
2:59 PM
CDT T5
6:00 PM
EDT
2h 1m
M T W T F S S
Prices
DL1674
DL Delta
738
3:19 PM
CDT T5
6:00 PM
EDT
1h 41m
M T W T F S S
Prices
CX7739
CX Cathay Pacific
E75
4:05 PM
CDT T3
7:13 PM
EDT
2h 8m
M T W T F S S
Prices
AA4703
AA American
E75
4:05 PM
CDT T3
7:13 PM
EDT
2h 8m
M T W T F S S
Prices
AS4534
AS Alaska
E75
4:05 PM
CDT T3
7:13 PM
EDT
2h 8m
M T W T F S S
Prices
GF4159
GF Gulf
319
4:19 PM
CDT T3
7:27 PM
EDT
2h 8m
M T W T F S S
Prices
AA1855
AA American
319
4:19 PM
CDT T3
7:27 PM
EDT
2h 8m
M T W T F S S
Prices
F92198
F9 Frontier
32Q
4:28 PM
CDT T5
7:54 PM
EDT
2h 26m
M T W T F S S
Prices
F91442
F9 Frontier
21N
5:11 PM
CDT T5
8:35 PM
EDT
2h 24m
M T W T F S S
Prices
AM3926
AM Aeromexi
739
5:59 PM
CDT T5
9:03 PM
EDT
2h 4m
M T W T F S S
Prices
AC3291
AC Air Canada
738
6:08 PM
CDT T1
9:12 PM
EDT
2h 4m
M T W T F S S
Prices
UA1795
UA United
738
6:18 PM
CDT T1
9:28 PM
EDT
2h 10m
M T W T F S S
Prices
UA1398
UA United
738
6:21 PM
CDT T1
9:35 PM
EDT
2h 14m
M T W T F S S
Prices
DL2738
DL Delta
320
6:41 PM
CDT T5
9:28 PM
EDT
1h 47m
M T W T F S S
Prices
AA882
AA American
319
6:54 PM
CDT T3
10:01 PM
EDT
2h 7m
M T W T F S S
Prices
GF4310
GF Gulf
319
6:54 PM
CDT T3
10:01 PM
EDT
2h 7m
M T W T F S S
Prices
AS4743
AS Alaska
319
6:54 PM
CDT T3
10:01 PM
EDT
2h 7m
M T W T F S S
Prices
AS6762
AS Alaska
319
6:54 PM
CDT T3
10:01 PM
EDT
2h 7m
M T W T F S S
Prices
AA2779
AA American
319
7:13 PM
CDT T3
10:23 PM
EDT
2h 10m
M T W T F S S
Prices
AF2586
AF Air France
739
7:59 PM
CDT T5
11:07 PM
EDT
2h 8m
M T W T F S S
Prices
AA3356
AA American
E75
8:25 PM
CDT T3
11:27 PM
EDT
2h 2m
M T W T F S S
Prices
AY4042
AY Finnair
E75
8:25 PM
CDT T3
11:27 PM
EDT
2h 2m
M T W T F S S
Prices
DL2879
DL Delta
320
8:29 PM
CDT T5
11:18 PM
EDT
1h 49m
M T W T F S S
Prices

No flights match your filters.

No nonstop flights on this route. connecting options below.

1-STOP
2-STOP Loading...
Atlanta to Chicago
14 carriers, 354 flights/week nonstop.
14 Airlines 354 Flights/wk 607 mi 1h 43m nonstop -1h behind 195 1-stop hubs

ATL–ORD is served by 14 airlines with nonstop service. American Airlines, British Airways and Delta Air Lines lead the route. The flight covers 607 miles in approximately 1h 43m. Beyond nonstop, 195 hubs offer 1-stop connections.

Airline Landscape

All carriers operating nonstop ATL–ORD service, compared side by side.
Airline Freq/wk Aircraft Duration Dep OTP Alliance Codeshares
AA American Airlines 49 319, E70, E75, E75S 2h09-2h29 59% Oneworld
BA British Airways 49 319, E75 2h19-2h29 59% Oneworld
DL Delta Air Lines 49 320, 321, 738, 739 2h-2h21 59% SkyTeam
AM Aeromexico 42 321, 738, 739 2h-2h11 59% SkyTeam
UA United Airlines 42 320, 737, 738, 73G 2h05-2h22 59% Star Alliance
AC Air Canada 35 319, 320, 738, 739 2h18-2h21 59% Star Alliance
AS Alaska Airlines 25 E75 2h19-2h26 59% Oneworld
F9 Frontier 21 A20N, A21N 1h59-2h31 59%
AF Air France 19 739 2h-2h04 59% SkyTeam
CX Cathay Pacific 7 E70 2h19 59% Oneworld
EK Emirates 7 319 2h20 59%
GF Gulf Air 7 E70 2h21 59%
NK Spirit Airlines 1 32Q 2h12 59%
QR Qatar Airways 1 59% Oneworld
Aircraft on this route
319 Airbus A319 – AA, AC, BA, EK
320 Airbus A320 – AC, DL, UA
321 Airbus A321 – AM, DL
32Q Airbus A321neo – NK
737 Boeing 737-700 – UA
738 Boeing 737-800 – AC, AM, DL, UA
739 Boeing 737-900 – AC, AF, AM, DL
73G Boeing 737-700 – UA
A20NF9
A21NF9
E70 Embraer 170 – AA, CX, GF
E75 Embraer E175 – AA, AS, BA
E75S Embraer E175 STD – AA
Alliance coverage
Oneworld: AA + AS + BA + CX + QR (131 flights/wk, 37%)
SkyTeam: AF + AM + DL (110 flights/wk, 31%)
Star Alliance: AC + UA (77 flights/wk, 22%)
Unaffiliated: EK + F9 + GF + NK (36 flights/wk, 10%)
OTP based on airport-level delay snapshots. Duration ranges reflect seasonal/directional variation.

Weekly Schedule Pattern

Nonstop flight frequency by day of week, ATL to ORD direction.
Mon
50
flights
Tue
52
flights
Wed
50
flights
Thu
51
flights
Fri
51
flights
Sat
49
flights
Sun
50
flights
Departure time distribution
12 AM6 AM12 PM6 PM12 AM
Morning departures
Afternoon/evening departures
57
Nonstop flights
354
Outbound / wk
338
Return / wk

Connection Landscape

Beyond nonstop. 1-stop and 2-stop options for ATL to ORD.
1-STOP
One-Stop Connections
195
Hubs
~3h
Fastest
~45h
Longest
Verified with published schedule alignment and minimum connection time.
2-STOP
Two-Stop Connections
7,530
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
ATL → ORD
59%
Frequent delays expected. Consider flexible booking.
Departing
59%
Arriving
100%
Return
ORD → ATL
40%
Frequent delays expected. Consider flexible booking.
Departing
40%
Arriving
100%
OTP = percentage of flights arriving within 15 min of schedule. Based on airport-level delay snapshots. ATL delays → ORD delays →

Other ways to reach Chicago from Atlanta

Nearby airports with service to Chicago O'Hare International Airport.
Metric ATL→ORD MCN→ORD CHA→ORD
Distance from ATL 79 mi 106 mi
Nonstop airlines 14 2 4
Weekly flights 354 99
Flight time 1h 43m 2h 5m 1h 41m
Departure OTP 59%
Airports within 200 miles of ATL with service to Chicago O'Hare International Airport.

Travel Essentials

Practical planning for this route.
Time Difference
-1h
Chicago is 1 hour behind Atlanta.
ATL: EDT · ORD: CDT

When it's 6:00 PM in Atlanta, it's 5:00 PM in Chicago.
Distance & Flight Time
607 mi / 976 km
Nonstop flight time is approximately 1h 43m to 2h 31m.
Getting to ATL

MARTA Gold Line runs every 12–15 minutes from downtown Five Points station to the airport (16 min, $2.50). The station connects directly to the Domestic terminal via SkyTrain. Ride-shares cost $20–35 from downtown.

Economy parking in the North/South garages fills quickly; off-site lots on Camp Creek Parkway offer cheaper rates with shuttles.

Getting from ORD

CTA Blue Line runs 24/7 from O'Hare to downtown Chicago (45 min, $5). Taxis use a flat-rate zone system; downtown is around $40–45 plus tip. Ride-shares are typically $30–50.The Airport Transit System (ATS) connects all terminals and parking. Metra commuter rail does not serve O'Hare directly; transfer downtown via Blue Line.

Chicago Climate

Continental climate with four distinct seasons. Summers are warm and humid (25–32°C) with afternoon thunderstorms. Winters are cold (−10 to −2°C) with heavy snowfall that regularly delays flights December through March.

Spring and fall are mild but unpredictable. Pack layers. Lake Michigan moderates temperatures near the lakefront, but O'Hare sits inland and runs colder.

ATL–ORD Quick Facts

Key statistics for the Atlanta to Chicago route.
Route details
Distance607 mi / 976 km
Flight time1h 43m to 2h 31m
Time difference-1 hour
Airlines (nonstop)14
Weekly flights354 out / 338 return
1-stop connections195 hubs
Origin: ATL
IATA / ICAOATL / KATL
TimezoneAmerica/Kentucky/Monticello
Passengers/yr108.1M
Elevation1,026 ft / 313 m
Destination: ORD
IATA / ICAOORD / KORD
TimezoneAmerica/Chicago
Passengers/yr80.0M
Elevation680 ft / 207 m

Frequently Asked Questions

Common questions about ATL to ORD flights.
Nonstop flights from Hartsfield Jackson Atlanta International Airport to Chicago O'Hare International Airport take approximately 1h 43m to 2h 31m. The route covers 607 miles.
There are approximately 354 nonstop flights per week from ATL to ORD. The return direction has about 338 weekly flights.
Yes, 1-stop connections are available through COU, MKC, MKL, TEB, SHV, APF, MGM, SLN, BED, MLB, GJT, MTJ, SDQ, BZE, GCM, STX, GNV, LIR, PLS, BFI, CUR, SJD, GIG, QRO, MTY, CUN, GRB, FWA, PWM, CID, SDF, AVL, ATW, IAD, SYR, DUB, MLI, MSN, YYZ, ABE, CRW, MCO, LUX, GSP, BHM, MEX, MKE, IND, DTW, RDU, CHA, GRR, BWI, MEM, MSP, STL, CLE, LEX, ILM, DAY, CVG, ICT, LIT, CLT, GSO, SJC, CHO, LIS, ONT, XNA, CMH, ASE, FSD, BMI, DCA, MSY, BNA, MCI, SMF, CZM, ALB, MDT, CHS, FAR, BUF, RIC, IAH, CAE, ROA, EWR, HSV, PHL, DFW, LGA, JAX, EVV, ORF, AGS, BDL, BRU, RNO, ELP, SAV, RSW, PIT, BTV, JFK, SGF, BOS, TYS, MIA, DAL, GEG, TPA, DEN, PVD, GDL, OMA, HPN, SBN, TUL, YUL, ZRH, SAT, AUS, OKC, DSM, FLL, ECP, PHX, MAD, PNS, ROC, LHR, PBI, EYW, MYR, COS, SEA, PDX, SRQ, LAS, TUS, BOI, ABQ, BCN, SLC, PUJ, VPS, FRA, SJU, FCO, LAX, MUC, YYC, ANC, SFO, HNL, AMS, YVR, SNA, PTY, SAN, ATH, SJO, BZN, MXP, JAC, PSP, EGE, HHH, CDG, MBJ, HVN, YWG, KIX, CPH, NAS, LGG, HDN, AUA, PVR, GUA, STT, SXM, BJX, BOG, UVF, GRU, IST, AUH, OGG, DOH, ICN and HND. These options provide additional schedule flexibility.
Chicago is 1 hour behind Atlanta.
Yes, return flights from ORD to ATL are available. Use the direction toggle at the top to view the return schedule.
Nearby alternatives include MCN, CHA and BHM. 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.
Passengers in the Southeast US sometimes fly ATL–ORD to connect to United's transatlantic departures from O'Hare, accessing European destinations where Delta's ATL network has gaps or where ORD scheduling is more convenient. The combined ATL–ORD + ORD–Europe block time is competitive with connecting through other hubs.
Delta operates into Terminal 3 at ORD (its O'Hare operations). United uses Terminals 1 and 3. American uses Terminal 3 as well. If your ATL–ORD flight is on Delta and you need to connect to a United flight at ORD, you'll need to exit security, transfer between terminals, and re-clear. Allow at least 75 minutes for this type of cross-terminal connection.
Delta runs banked complexes at ATL typically aligned around the hour. The first major morning bank starts around 5:30–7am, meaning early ATL–ORD departures have good ATL collection from overnight inbounds. Mid-morning ORD arrivals align well with United's late-morning ORD domestic departure bank.

Atlanta to Chicago O'Hare

The ATL–ORD route links Delta's primary hub with United's and American's shared O'Hare hub, making it both an O&D business corridor between two major Midwest cities and a hub-to-hub connector used by interline and codeshare itineraries. Nine carriers operate over 310 weekly departures on the roughly 2-hour sector. It ranks among the higher-frequency northeast-corridor routes in the US domestic network.

Chicago O'Hare Terminal Geography

ORD's four terminals (1, 2, 3, and 5 for international) are not all connected airside. Terminals 1, 2, and 3 share a secure zone, while Terminal 5 requires re-clearing customs and security. Passengers arriving at ORD from ATL and connecting internationally should confirm terminal assignments well in advance of travel. The multi-billion-dollar ORD modernisation project continues to affect concourse layouts through at least 2027.