Ontario to Baltimore (ONT–BWI) — Airlines, Schedules & Connections

ONT Airport Page →
2,278 mi airlines 14/wk
On-time Some delays Frequent delays
Flight Schedule 5 flights Verified 48m ago
Nonstop 1-Stop 2-Stop Hide separate tickets Hide overnight
  Flight Airline AC Dep Arr Dur OTP Sched  
WN3648
WN Southwest
7M8
9:55 PM
PDT T4
5:40 AM+1
EDT
4h 45m
M T W T F S S
Prices
WN4128
WN Southwest
73H
10:29 PM
PDT T4
6:10 AM+1
EDT
4h 41m
M T W T F S S
Prices
WN4022
WN Southwest
B38M
1:10 PM
EDT
3:55 PM
PDT
5h 45m
M T W T F S S
Prices
WN2416
WN Southwest
7M8
1:45 PM
EDT
4:20 PM
PDT
5h 35m
M T W T F S S
Prices
WN1278
WN Southwest
73H
3:37 PM
EDT
5:32 PM
PDT
4h 55m
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...
Ontario to Baltimore
1 carrier, 14 flights/week nonstop.
1 Airlines 14 Flights/wk 2,278 mi 4h 41m nonstop +3h ahead 24 1-stop hubs

ONT–BWI is served by 1 airline with nonstop service. Southwest Airlines leads the route. The flight covers 2,278 miles in approximately 4h 41m. Beyond nonstop, 24 hubs offer 1-stop connections.

Airline Landscape

All carriers operating nonstop ONT–BWI service, compared side by side.
Airline Freq/wk Aircraft Duration Dep OTP Alliance Codeshares
WN Southwest Airlines 14 73H, 7M8 4h41-4h45 63%
Aircraft on this route
73H Boeing 737-800 – WN
7M8 Boeing 737 MAX 8 – WN
Alliance coverage
Unaffiliated: WN (14 flights/wk, 100%)
OTP based on airport-level delay snapshots. Duration ranges reflect seasonal/directional variation.

Weekly Schedule Pattern

Nonstop flight frequency by day of week, ONT to BWI direction.
Mon
2
flights
Tue
2
flights
Wed
2
flights
Thu
2
flights
Fri
2
flights
Sat
2
flights
Sun
2
flights
Departure time distribution
12 AM6 AM12 PM6 PM12 AM
Morning departures
Afternoon/evening departures
2
Nonstop flights
14
Outbound / wk
14
Return / wk

Connection Landscape

Beyond nonstop. 1-stop and 2-stop options for ONT to BWI.
1-STOP
One-Stop Connections
24
Hubs
~6h
Fastest
~23h
Longest
Verified with published schedule alignment and minimum connection time.
2-STOP
Two-Stop Connections
1,223
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
ONT → BWI
63%
Moderate delays possible. Allow buffer time.
Departing
63%
Arriving
88%
Return
BWI → ONT
68%
Moderate delays possible. Allow buffer time.
Departing
68%
Arriving
84%
OTP = percentage of flights arriving within 15 min of schedule. Based on airport-level delay snapshots. ONT delays → BWI delays →

Other ways to reach Baltimore from Ontario

Nearby airports with service to Baltimore/Washington International Thurgood Marshall Airport.
Metric ONT→BWI SBD→BWI SNA→BWI
Distance from ONT 21 mi 30 mi
Nonstop airlines 1 1 1
Weekly flights 14 2
Flight time 4h 41m 4h 34m 4h 9m
Departure OTP 63%
Airports within 200 miles of ONT with service to Baltimore/Washington International Thurgood Marshall Airport.

Travel Essentials

Practical planning for this route.
Time Difference
+3h
Baltimore is 3 hours ahead of Ontario.
ONT: PDT · BWI: EDT

When it's 6:00 PM in Ontario, it's 9:00 PM in Baltimore.
Distance & Flight Time
2,278 mi / 3,666 km
Nonstop flight time is approximately 4h 41m to 4h 45m.

ONT–BWI Quick Facts

Key statistics for the Ontario to Baltimore route.
Route details
Distance2,278 mi / 3,666 km
Flight time4h 41m to 4h 45m
Time difference+3 hours
Airlines (nonstop)1
Weekly flights14 out / 14 return
1-stop connections24 hubs
Origin: ONT
IATA / ICAOONT / KONT
TimezoneAmerica/Los_Angeles
Passengers/yr7.0M
Elevation944 ft / 288 m
Destination: BWI
IATA / ICAOBWI / KBWI
TimezoneAmerica/New_York
Passengers/yr26.4M
Elevation146 ft / 45 m

Frequently Asked Questions

Common questions about ONT to BWI flights.
Nonstop flights from Ontario International Airport to Baltimore/Washington International Thurgood Marshall Airport take approximately 4h 41m to 4h 45m. The route covers 2,278 miles.
1 airline operates nonstop service: Southwest Airlines.
There are approximately 14 nonstop flights per week from ONT to BWI. The return direction has about 14 weekly flights.
Yes, 1-stop connections are available through ILN, SDF, CVG, EWR, OAK, FLL, MDW, SJC, ORD, SMF, SFO, CLT, BNA, DEN, ATL, DAL, DFW, PHX, LAS, SLC, HOU, IAH, AUS and SEA. These options provide additional schedule flexibility.
Baltimore is 3 hours ahead of Ontario.
Yes, return flights from BWI to ONT are available. Use the direction toggle at the top to view the return schedule.
Nearby alternatives include SBD, SNA and LAX. 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.

Flights from ONT to BWI

Ontario International Airport (ONT) and Baltimore/Washington International Thurgood Marshall Airport (BWI) are connected by nonstop service from Southwest Airlines. With 14 weekly departures, this is a well served route.

ONT to BWI Flight Duration and Schedule

Nonstop flight time from ONT to BWI ranges from 4 hours 41 minutes to 4 hours 45 minutes. The route covers a distance of 2,278 miles (3,666 km). There are approximately 14 weekly flights outbound and 14 return, totaling 28 flights per week in both directions.

Connecting Options and Alternatives

24 one-stop connections are available, with the fastest taking approximately 6 hours via ILN. Two-stop connections are also available via intermediate hubs. Nearby alternative airports include San Bernardino (SBD), Santa Ana (SNA) and Los Angeles (LAX).