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Route

Seattle → Ontario

BFISeattleKing County International Airport - Boeing Field
ONTOntarioOntario International Airport
Distance
962 mi
Estimated flight time
~2h 25m

Same local time in Seattle and Ontario.

Observed nonstop

View the reverse route

How often does this route fly?

Frequency

A couple of times a day

On average around 2 flights a day, observed from October 2025 to September 2026.

2
flights per day
3
busiest month · Feb
2
quietest month · Oct
2 hr 4 min
measured flight time
12 / 12
months seen

Through the year

Per day, month by month

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

In December 2025 we saw less traffic at Seattle in general than usual; compare that month with care.

Airlines

Who flies it

UPS Airlinesall year

Through the day

Departure times

Local time in Seattle. Most departures between 18:00 and 21:00.

  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. 0.2Mon
  2. 1.9Tue
  3. 2.3Wed
  4. 2.6Thu
  5. 2.6Fri
  6. 0.2Sat
  7. 0.3Sun

Fleet

Aircraft observed

  1. Boeing 767-300B76369%
  2. Boeing 757-200B75223%
  3. McDonnell Douglas MD-11MD113%
  4. Cessna Citation CJ3C25B1%
  5. Airbus A300-600A3061%
All the numbers in a table
MonthPer daySeenAirlines
January 2026240
  • UPS Airlines38×
February 2026341
  • UPS Airlines39×
March 2026244
  • UPS Airlines41×
April 2026347
  • UPS Airlines46×
May 2026238
  • UPS Airlines37×
June 2026250
  • UPS Airlines49×
July 2026353
  • UPS Airlines49×
August 2026238
  • UPS Airlines35×
September 2026236
  • UPS Airlines36×
October 2025246
  • UPS Airlines42×
November 2025237
  • UPS Airlines35×
December 2025244
  • UPS Airlines38×

Airlines observed on this route

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

UPS Airlines

5X · UPS

Hub: SDF Louisville

154 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 Seattle: 63.
  • Direct destinations observed from Ontario: 63.

The airports on this route

King County International Airport - Boeing Field

Seattle, United StatesBFI / KBFI

Regional airport · 63 direct destinations · 2 runways · longest runway 10,007 ft

48 °F · CloudySource: METAR observation via the NOAA Aviation Weather Center

Airport pageAll direct destinations

Ontario International Airport

Ontario, United StatesONT / KONT

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

82 °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.

SEA ONTSeattle–Tacoma International AirportSeattle is about 6 mi from Seattle.View route →BFI SNAJohn Wayne Orange County International AirportSanta Ana is about 30 mi from Ontario.View route →BFI LGBLong Beach International AirportLong Beach is about 35 mi from Ontario.View route →BFI HHRJack Northrop Field Hawthorne Municipal AirportHawthorne is about 43 mi from Ontario.View route →

About the route from Seattle to Ontario

The observed direct connection between King County International Airport - Boeing Field (BFI) and Ontario International Airport (ONT) covers approximately 962 mi. The estimated flight time is around 2h 25m. UPS Airlines has been observed on this connection in the available route data.

Frequently asked questions about this route

How far is Seattle from Ontario by air?
The great-circle distance between King County International Airport - Boeing Field and Ontario International Airport is approximately 962 mi.
How long is the flight from Seattle to Ontario?
Based on the distance, the estimated flight time is about 2h 25m. This is an estimate, not a schedule.
Is there a direct connection from Seattle to Ontario?
Yes, a direct connection between BFI and ONT has been observed in our route data.
Which airlines have been observed on this route?
In the available route data: UPS Airlines.
How often is there a flight from Seattle to Ontario?
On average around 2 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 514 observed flights. Mainly UPS Airlines. That is an observation, not a timetable.
What is the current time difference between Seattle and Ontario?
Same local time in Seattle and 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.