Ontario Airport (ONT) Flights to Seattle Airport (SEA)

We've found the cheapest flights to Seattle

Returns from £80.46

One-way from £39.49

If it is your first time travelling to Seattle-Tacoma International then check out the airliners Korean Air, Jet Linx Aviation, Icelandair, WestJet, Qatar Airways, KLM, Virgin Atlantic, Alaska Airlines and Delta Connection. These airliners all offer direct flights that depart from Ontario International, so you will find flying to Seattle-Tacoma International is quite easy. The flight from Ontario International to Seattle-Tacoma International is approximately 1,540 Kilometers which is 957 Miles. You should expect a flight time of around 2 Hours 37 Minutes.

The cost of flights varies on the time and day you fly. To obtain the best prices for Seattle-Tacoma International flights than book well in advance. The ticket prices for most airliners will increase the closer you get the departure date, so as soon as you know the date you will travel you should book your flights.

For a full summary of all the airliners that fly from Ontario International to Seattle-Tacoma International, please see the table below.

Flights Chart
AirlinerMoTuWeThFrSaSuFirst FlightLast FlightFlights
Delta Connection444444406:4517:50VIEW FLIGHTS
Alaska Airlines434443406:0019:59VIEW FLIGHTS
Virgin Atlantic333333311:5217:50VIEW FLIGHTS
KLM233333306:4513:35VIEW FLIGHTS
Qatar Airways222243406:0019:41VIEW FLIGHTS
WestJet133222206:4513:35VIEW FLIGHTS
Jet Linx Aviation111111106:0008:50VIEW FLIGHTS
Icelandair111111110:3912:06VIEW FLIGHTS
Korean Air011111106:4506:45VIEW FLIGHTS

Delta Connection offer the highest number of flights for this route with departures times between 06:45 and 17:50.

If you wish to book your flight with Delta Connection then we advise you book direct from their website at www.google.com/search?q=Delta Connection. The best discounts can only be obtained from their website.

The flight time for the selected route vary based on the month you will travel, but below we has summarised the most common times they will fly. We recommend you only take these times as guidance and check with appropriate airline for the exact times for the date you depart.

Flights Time In WeekDays
DayFlight TimesFlights
Monday
08:50
AirlineFlight  No
Alaska AirlinesAS607
Qatar AirwaysQR2182
Jet Linx AviationJL6389
09:49
AirlineFlight  No
Delta ConnectionDL3816
10:39
AirlineFlight  No
Alaska AirlinesAS654
IcelandairFI7707
Qatar AirwaysQR2186
11:52
AirlineFlight  No
KLMKL6941
Delta ConnectionDL4070
Virgin AtlanticVS5467
13:35
AirlineFlight  No
WestJetWS7763
KLMKL5993
Delta ConnectionDL3840
Virgin AtlanticVS4052
15:26
AirlineFlight  No
Alaska AirlinesAS729
17:50
AirlineFlight  No
Delta ConnectionDL4031
Virgin AtlanticVS3853
19:59
AirlineFlight  No
Alaska AirlinesAS594
VIEW FLIGHTS
Tuesday
06:00
AirlineFlight  No
Alaska AirlinesAS607
Qatar AirwaysQR2107
Jet Linx AviationJL6389
06:45
AirlineFlight  No
Korean AirKE3098
WestJetWS5438
WestJetWS7523
KLMKL6721
Delta ConnectionDL3816
10:39
AirlineFlight  No
Alaska AirlinesAS654
IcelandairFI7707
Qatar AirwaysQR2131
11:52
AirlineFlight  No
KLMKL6941
Delta ConnectionDL4070
Virgin AtlanticVS5467
13:35
AirlineFlight  No
WestJetWS7763
KLMKL5993
Delta ConnectionDL3840
Virgin AtlanticVS4052
15:26
AirlineFlight  No
Alaska AirlinesAS729
17:50
AirlineFlight  No
Delta ConnectionDL4031
Virgin AtlanticVS3853
VIEW FLIGHTS
Wednesday
06:00
AirlineFlight  No
Alaska AirlinesAS607
Qatar AirwaysQR2107
Jet Linx AviationJL6389
06:45
AirlineFlight  No
Korean AirKE3098
WestJetWS5438
WestJetWS7523
KLMKL6721
Delta ConnectionDL3816
11:52
AirlineFlight  No
KLMKL6941
Delta ConnectionDL4070
Virgin AtlanticVS5467
12:06
AirlineFlight  No
Alaska AirlinesAS654
IcelandairFI7707
Qatar AirwaysQR2131
13:35
AirlineFlight  No
WestJetWS7763
KLMKL5993
Delta ConnectionDL3840
Virgin AtlanticVS4052
16:03
AirlineFlight  No
Alaska AirlinesAS625
17:50
AirlineFlight  No
Delta ConnectionDL4031
Virgin AtlanticVS3853
19:41
AirlineFlight  No
Alaska AirlinesAS592
VIEW FLIGHTS
Thursday
06:00
AirlineFlight  No
Alaska AirlinesAS607
Jet Linx AviationJL6389
06:45
AirlineFlight  No
Korean AirKE3098
WestJetWS7523
KLMKL6721
Delta ConnectionDL3816
11:52
AirlineFlight  No
KLMKL6941
Delta ConnectionDL4070
Virgin AtlanticVS5467
12:04
AirlineFlight  No
Alaska AirlinesAS654
IcelandairFI7707
13:35
AirlineFlight  No
WestJetWS7763
KLMKL5993
Delta ConnectionDL3840
Virgin AtlanticVS4052
16:03
AirlineFlight  No
Alaska AirlinesAS625
Qatar AirwaysQR2036
17:50
AirlineFlight  No
Delta ConnectionDL4031
Virgin AtlanticVS3853
19:41
AirlineFlight  No
Alaska AirlinesAS592
Qatar AirwaysQR3355
VIEW FLIGHTS
Friday
06:00
AirlineFlight  No
Alaska AirlinesAS607
Qatar AirwaysQR2107
Jet Linx AviationJL6389
06:45
AirlineFlight  No
Korean AirKE3098
WestJetWS7523
KLMKL6721
Delta ConnectionDL3816
11:52
AirlineFlight  No
KLMKL6941
Delta ConnectionDL4070
Virgin AtlanticVS5467
12:04
AirlineFlight  No
Alaska AirlinesAS654
IcelandairFI7707
Qatar AirwaysQR2127
13:35
AirlineFlight  No
WestJetWS7763
KLMKL5993
Delta ConnectionDL3840
Virgin AtlanticVS4052
16:03
AirlineFlight  No
Alaska AirlinesAS625
Qatar AirwaysQR2036
17:50
AirlineFlight  No
Delta ConnectionDL4031
Virgin AtlanticVS3853
19:41
AirlineFlight  No
Alaska AirlinesAS592
Qatar AirwaysQR3355
VIEW FLIGHTS
Saturday
06:00
AirlineFlight  No
Alaska AirlinesAS607
Qatar AirwaysQR2107
Jet Linx AviationJL6389
06:45
AirlineFlight  No
Korean AirKE3098
WestJetWS7523
KLMKL6721
Delta ConnectionDL3816
11:52
AirlineFlight  No
KLMKL6941
Delta ConnectionDL4070
Virgin AtlanticVS5467
12:04
AirlineFlight  No
Alaska AirlinesAS654
IcelandairFI7707
Qatar AirwaysQR2127
13:35
AirlineFlight  No
WestJetWS7763
KLMKL5993
Delta ConnectionDL3840
Virgin AtlanticVS4052
16:03
AirlineFlight  No
Alaska AirlinesAS625
Qatar AirwaysQR2036
17:45
AirlineFlight  No
Delta ConnectionDL4031
Virgin AtlanticVS3853
VIEW FLIGHTS
Sunday
06:00
AirlineFlight  No
Alaska AirlinesAS607
Qatar AirwaysQR2107
Jet Linx AviationJL6389
06:45
AirlineFlight  No
Korean AirKE3098
WestJetWS7523
KLMKL6721
Delta ConnectionDL3816
11:52
AirlineFlight  No
KLMKL6941
Delta ConnectionDL4070
Virgin AtlanticVS5467
12:04
AirlineFlight  No
Alaska AirlinesAS654
IcelandairFI7707
Qatar AirwaysQR2127
13:35
AirlineFlight  No
WestJetWS7763
KLMKL5993
Delta ConnectionDL3840
Virgin AtlanticVS4052
16:03
AirlineFlight  No
Alaska AirlinesAS625
Qatar AirwaysQR2036
17:50
AirlineFlight  No
Delta ConnectionDL4031
Virgin AtlanticVS3853
19:41
AirlineFlight  No
Alaska AirlinesAS592
Qatar AirwaysQR3355
VIEW FLIGHTS

If you are flexible on the airport you depart from, then there are other airports that offer direct flights to Seattle-Tacoma International. You can see full details of these below.

Alternative Direct Routes
RouteStopsDistanceFlying Time
Burbank to Seattle02 Hours 35 Minutes
Las Vegas to Seattle02 Hours 27 Minutes
Los Angeles to Seattle02 Hours 37 Minutes
Palm Springs Municipal to Seattle02 Hours 41 Minutes
San Diego to Seattle02 Hours 48 Minutes
Santa Barbara Municipal to Seattle02 Hours 32 Minutes
San Bernardino Norton Afb to Seattle02 Hours 38 Minutes
Santa Ana John Wayne to Seattle02 Hours 40 Minutes

Over the past 10 years flight regulations have become very strict so we advise you to leave plenty of time to check in and get through customs.

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Flight Price FAQ - Ontario (ONT) to Seattle (SEA)

DIRECT Frontier Airlines
What is the cheapest direct flight one way from Ontario ONT to Seattle SEA?
The cheapest direct flight one way from Ontario ONT to Seattle SEA is £39.49 ($53 €45.70)
£39.49
$53 | €45.70
Check Latest Price
DIRECT Frontier Airlines
What is the cheapest direct return flight from Ontario ONT to Seattle SEA?
The cheapest direct return flight from Ontario ONT to Seattle SEA is £80.46 ($108 €93.13)
£80.46
$108 | €93.13
Check Latest Price
Important Note: Prices shown are taken from searches performed for flights operating during the current month. Please use the "Latest Price" buttons to get the most up to date airfares.

Compare Flight Prices from ONT to SEA

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Flight Info FAQ - Ontario (ONT) to Seattle (SEA)

Who flies from Ontario to Seattle?
The following airlines fly from Ontario (ONT) to Seattle (SEA): Alaska Airlines, Delta Connection, Icelandair, Jet Linx Aviation, KLM, Korean Air, Qatar Airways, Virgin Atlantic, WestJet.
How far is the flight from Ontario to Seattle?
The flight from Ontario to Seattle is 1,540KM or 957 miles.
How long does the flight from Ontario to Seattle to take?
The flight from Ontario to Seattle takes 2 Hours 37 Minutes.

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