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

ONT Airport Page →
2,278 mi airlines charter/private
On-time Some delays Frequent delays
Connecting Flight Schedule 21 1-stop flights Verified 1mo ago
Nonstop Charter / private 1-Stop 2-Stop Hide separate tickets Hide overnight Hide codeshares
  Flight Airline AC Dep Arr Dur OTP Sched  
✈ Nonstop

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.

Last scheduled nonstop: Aug 2026.

✦ 1-Stop connections via 10 hubs
LAS Las Vegas 6h 18m F9WNY4 → WN Las Vegas (LAS) to Baltimore flights
DEN Denver 6h 20m ACF9UA → UAWN Denver (DEN) to Baltimore flights
MDW Chicago 6h 23m WN → WN Chicago (MDW) to Baltimore flights
PHX Phoenix 6h 33m AAPDWN → WN Phoenix (PHX) to Baltimore flights
BNA Nashville 6h 40m WN → AASYWN Nashville (BNA) to Baltimore flights
DAL Dallas 6h 40m WN → WN Dallas (DAL) to Baltimore flights
ATL Atlanta 6h 46m AFAMDL → AFAMDL Atlanta (ATL) to Baltimore flights
HOU Houston 6h 54m WN → WN Houston (HOU) to Baltimore flights
SLC Salt Lake City 6h 58m AFAMDL → DLWN Salt Lake City (SLC) to Baltimore flights
CLT Charlotte 7h AA → AAF9FFL Charlotte (CLT) to Baltimore flights
✦ 1-STOP More options, longer trips
✧ 2-STOP Loading... Reach the hardest destinations
Ontario to Baltimore
Connecting service available through multiple hubs.
1 Airlines 2,278 mi 4h 37m nonstop +3h ahead

ONT–BWI had nonstop service from Southwest Airlines, last on the schedule in August 2026. There's no nonstop on it right now, so today you'd fly it with one stop. The connecting options below are sorted by layover. Nonstop, it's about 2,278 miles in 4h 37m.

Also explore Browse available seat maps ONT Routes BWI Routes ONT Live Flights BWI Live Flights ONT Delays BWI Delays
All flights from Baltimore (BWI) Baltimore to Ontario flights
Carriers on this route

Airline Landscape

Carriers that operated nonstop ONT–BWI service, compared side by side.
Airline Freq/wk Aircraft Duration Dep OTP Alliance Codeshares
WN Southwest Airlines 0 – – 100% – –
Alliance coverage
Unaffiliated: WN (0 flights/wk, 0%)
OTP based on airport-level delay snapshots. Duration ranges reflect seasonal/directional variation.
Connections

Connection Landscape

1-stop and 2-stop options for ONT to BWI.
1-STOP
One-Stop Connections
21
Hubs
~6h
Fastest
~18h
Longest
LAS ~6h 18m DEN ~6h 20m MDW ~6h 23m PHX ~6h 33m BNA ~6h 40m
Verified with published schedule alignment and minimum connection time.
2-STOP
Two-Stop Connections
1,138
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.
Reliability

On-Time Performance

What to expect at each end of your journey.
Outbound
ONT → BWI
100%
Generally reliable. Most flights run on time.
Departing
100%
Arriving
100%
Return
BWI → ONT
100%
Generally reliable. Most flights run on time.
Departing
100%
Arriving
100%
OTP = percentage of flights arriving within 15 min of schedule. Based on airport-level delay snapshots. ONT delays → BWI delays →
Alternatives

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 5
Weekly flights – 2 1
Flight time 4h 37m 4h 26m 4h 24m
Departure OTP 100% – –
San Bernardino (SBD) to Baltimore flights · Santa Ana (SNA) to Baltimore flights · Long Beach (LGB) to Baltimore flights
Airports within 200 miles of ONT with service to Baltimore/Washington International Thurgood Marshall Airport.
Know before you go

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 37m gate to gate.
Facts

ONT–BWI Quick Facts

Key statistics for the Ontario to Baltimore route.
Route details
Distance2,278 mi / 3,666 km
Flight time4h 37m
Time difference+3 hours
Airlines (nonstop)1
1-stop connectionsAvailable
Origin: ONT
Full nameOntario International Airport
IATA / ICAOONT / KONT
TimezoneAmerica/Los_Angeles
Passengers/yr7.0M
Elevation944 ft / 288 m
Destination: BWI
Full nameBaltimore/Washington International Thurgood Marshall Airport
IATA / ICAOBWI / KBWI
TimezoneAmerica/New_York
Passengers/yr26.4M
Elevation146 ft / 45 m
FAQ

Frequently Asked Questions

Common questions about ONT to BWI flights.
Nonstop flights from Ontario International Airport to Baltimore/Washington International Thurgood Marshall Airport take about 4h 37m gate to gate. The route covers 2,278 miles.
1 airline operated the nonstop from ONT to BWI: Southwest Airlines. The last scheduled nonstop was in August 2026. There's no nonstop right now, so today you'd fly it with one stop. See the connection options above, ranked by layover.
Not right now. The last scheduled nonstop was in August 2026. You can still fly it with one stop, and the connecting options above are sorted by layover. Nonstop, the hop took about 4h 37m.
Yes, 1-stop connections are available, ranked by layover time. Common connecting points include Harry Reid, Denver and Chicago Midway.
On a single ticket, yes. Your bags are checked through to BWI 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.
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 LGB. 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) had nonstop service from Southwest Airlines, last on the schedule in August 2026. The nonstop is dormant right now, so the way to fly it today is one connection, and the options above are sorted by layover.

ONT to BWI Flight Duration and Schedule

Nonstop flight time from ONT to BWI is about 4 hours 37 minutes gate to gate. The route covers a distance of 2,278 miles (3,666 km).

Connecting Options and Alternatives

1-stop connecting options are also available, commonly via Harry Reid, Denver and Chicago Midway. Two-stop connections are also available via intermediate hubs. Nearby alternative airports include San Bernardino (SBD), Santa Ana (SNA) and Long Beach (LGB).