Airlines with flights from Seattle to Ontario

There are five airlines with scheduled flights between SEA and ONT. Alaska Airlines, Delta and Frontier Airlines has non-stop flights from Seattle Airport to Ontario International Airport and the flight time is 2 hours and 34 minutes.

Choose airline

Schedules

Non-stop with Alaska Airlines

  • Total flight time: 2 hours and 34 minutes
  • One World Alliance
  • Seattle is a Alaska Airlines hub (Primary hub).
  • 18 flights per week
  • Boeing 737-800 (winglets) Passenger/BBJ2
    Boeing 737-900 Passenger
    Boeing 737-900 (winglets) Passenger/BBJ3
    Boeing 737-700 Passenger
    Boeing 737MAX 9 Passenger
  • Business and first class available
SEA
Direct
ONT

The timetable & schedule information was updated at 2025-02-17

Non-stop with Delta Air Lines

  • Total flight time: 2 hours and 47 minutes
  • Sky Team Alliance
  • Seattle is a Delta Air Lines hub.
  • 14 flights per week
  • Embraer 175 (Enhanced Winglets)
  • First class available
SEA
Direct
ONT

The timetable & schedule information was updated at 2025-02-17

Non-stop with Frontier Airlines

  • Total flight time: 2 hours and 37 minutes
  • Low-cost airline
  • 4 flights per week
  • Airbus A320neo
    A321neo
SEA
Direct
ONT

The timetable & schedule information was updated at 2025-02-17

Via Salt Lake City with Delta Air Lines

  • Total flight time: 4h 37m - 6h 56m.
  • Sky Team Alliance
  • Seattle is a Delta Air Lines hub.
  • 26 flights per week
  • Embraer 175 (Enhanced Winglets)
SEA
 
Via SLC
 
ONT

The timetable & schedule information was updated at 2025-02-17

Via Phoenix with American Airlines

  • Total flight time: 5h 21m - 7h 11m.
  • One World Alliance
  • 15 flights per week
SEA
 
Via PHX
 
ONT

The timetable & schedule information was updated at 2025-02-17

Via Portland with Alaska Airlines

  • Total flight time: 3h 46m - 5h 54m.
  • One World Alliance
  • Seattle is a Alaska Airlines hub (Primary hub).
  • 15 flights per week
  • Boeing 737-800 (winglets) Passenger/BBJ2
    Boeing 737-900 Passenger
    Boeing 737-900 (winglets) Passenger/BBJ3
    Boeing 737-700 Passenger
    Boeing 737MAX 9 Passenger
SEA
 
Via PDX
 
ONT
 
Flight
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AS3491
AS1066
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18:41
AS2387
AS1066
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19:50
19:50
SHOW RETURN SCHEDULE
CHECK PRICES FOR SEA - ONT

The timetable & schedule information was updated at 2025-02-17

Via Oakland with Southwest Airlines

  • Total flight time: 4h 15m - 6h 25m.
  • Low-cost airline
  • 13 flights per week
SEA
 
Via OAK
 
ONT
 
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WN138
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WN4153
WN5172
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19:00
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SHOW RETURN SCHEDULE
CHECK PRICES FOR SEA - ONT

The timetable & schedule information was updated at 2025-02-17

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