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Route

Ontario → Baltimore

ONTOntarioOntario International Airport
BWIBaltimoreBaltimore/Washington International Thurgood Marshall Airport
Distance
2,278 mi
Estimated flight time
~5h 5m

Baltimore is currently 3 hours ahead of Ontario.

Observed nonstop

View the reverse route

How often does this route fly?

Frequency

Daily at most

On average around 1 flights a day, observed from October 2025 to September 2026.

1
flights per day
1
busiest month · Oct
4 hr 21 min
measured flight time
10 / 12
months seen

Through the year

Per day, month by month

  1. 1Jan2026
  2. –Feb
  3. 1Mar
  4. 1Apr
  5. 1May
  6. 1Jun
  7. 1Jul
  8. 1Aug
  9. –Sep
  10. 1Oct2025
  11. 1Nov
  12. 1Dec

Airlines

Who flies it

Southwest Airlinesall year

Through the day

Departure times

Local time in Ontario. Most departures between 21:00 and 00:00.

  1. 00:00
  2. 01:00
  3. 02:00
  4. 03:00
  5. 04:00
  6. 05:00
  7. 06:00
  8. 07:00
  9. 08:00
  10. 09:00
  11. 10:00
  12. 11:00
  13. 12:00
  14. 13:00
  15. 14:00
  16. 15:00
  17. 16:00
  18. 17:00
  19. 18:00
  20. 19:00
  21. 20:00
  22. 21:00
  23. 22:00
  24. 23:00

Through the week

By weekday

  1. 0.6Mon
  2. 0.5Tue
  3. 0.4Wed
  4. 0.5Thu
  5. 0.6Fri
  6. 0.6Sat
  7. 0.6Sun

Fleet

Aircraft observed

  1. Boeing 737 MAX 8B38M41%
  2. Boeing 737-700B73730%
  3. Boeing 737-800B73828%
All the numbers in a table
MonthPer daySeenAirlines
January 202614
  • Southwest Airlines4×
February 2026Not seen in this month.
March 2026123
  • Southwest Airlines23×
April 2026128
  • Southwest Airlines28×
May 2026128
  • Southwest Airlines28×
June 2026130
  • Southwest Airlines29×
July 2026130
  • Southwest Airlines30×
August 202614
  • Southwest Airlines4×
September 2026Not seen in this month.
October 2025126
  • Southwest Airlines26×
November 2025118
  • Southwest Airlines18×
December 2025112
  • Southwest Airlines12×

Airlines observed on this route

From observed callsign routes on ONT-BWI - not a booking guarantee.

Southwest Airlines

WN · SWA

Hub: DEN Denver

117 departure airportsView airline →

About this route

  • Domestic route: both airports are in the same country.
  • The opposite direction has also been observed as a direct connection.
  • Direct destinations observed from Ontario: 63.
  • Direct destinations observed from Baltimore: 104.

The airports on this route

Ontario International Airport

Ontario, United StatesONT / KONT

Major airport · 63 direct destinations · 2 runways · longest runway 12,198 ft

89 °F · CloudySource: METAR observation via the NOAA Aviation Weather Center

Airport pageAll direct destinations

Baltimore/Washington International Thurgood Marshall Airport

Baltimore, United StatesBWI / KBWI

Major airport · 104 direct destinations · 3 runways · longest runway 10,502 ft

79 °F · ClearSource: METAR observation via the NOAA Aviation Weather Center

Airport pageAll direct destinations

Alternative airports for this journey

Same journey, a different airport nearby - with an observed direct connection.

SBD BWISan Bernardino International AirportSan Bernardino is about 21 mi from Ontario.View route →LGB BWILong Beach International AirportLong Beach is about 35 mi from Ontario.View route →LAX BWILos Angeles International AirportLos Angeles is about 47 mi from Ontario.View route →ONT PHLPhiladelphia International AirportPhiladelphia is about 90 mi from Baltimore.View route →

About the route from Ontario to Baltimore

The observed direct connection between Ontario International Airport (ONT) and Baltimore/Washington International Thurgood Marshall Airport (BWI) covers approximately 2,278 mi. The estimated flight time is around 5h 5m. Southwest Airlines has been observed on this connection in the available route data.

Frequently asked questions about this route

How far is Ontario from Baltimore by air?
The great-circle distance between Ontario International Airport and Baltimore/Washington International Thurgood Marshall Airport is approximately 2,278 mi.
How long is the flight from Ontario to Baltimore?
Based on the distance, the estimated flight time is about 5h 5m. This is an estimate, not a schedule.
Is there a direct connection from Ontario to Baltimore?
Yes, a direct connection between ONT and BWI has been observed in our route data.
Which airlines have been observed on this route?
In the available route data: Southwest Airlines.
How often is there a flight from Ontario to Baltimore?
On average around 1 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 203 observed flights. Mainly Southwest Airlines. That is an observation, not a timetable.
What is the current time difference between Ontario and Baltimore?
Baltimore is currently 3 hours ahead of Ontario.

Where this data comes from

The route data comes from the flight archive (ADS-B, adsb.lol): which connections actually flew over the last twelve full months and who flew them, combined with our own airport, runway, and airline datasets. It is reference data about observed routes - not a current timetable and no claim about bookability.

The frequency and aircraft on this page come from the flight archive (ADS-B, 12 months, October 2025 to September 2026), summarized per route per month. We do not see every flight, so it is a floor, not a count.

Route data updated on October 11, 2026.