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

We've found the cheapest flights to Seattle

Returns from £100.03

One-way from £57.80

If it is your first time travelling to Seattle-Tacoma International then check out the airliners WestJet, Hawaiian Airlines, Korean Air, Jet Linx Aviation, Icelandair, KLM, Qatar Airways, 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 Connection444444407:0017:55VIEW FLIGHTS
Alaska Airlines334543401:4123:00VIEW FLIGHTS
Virgin Atlantic333333311:5317:55VIEW FLIGHTS
Qatar Airways222132306:0019:59VIEW FLIGHTS
KLM222222207:0011:53VIEW FLIGHTS
Korean Air111111107:0007:00VIEW FLIGHTS
Jet Linx Aviation111111106:0006:00VIEW FLIGHTS
Icelandair111111110:3310:39VIEW FLIGHTS
WestJet100112107:0014:20VIEW FLIGHTS
Hawaiian Airlines330000006:0019:08VIEW FLIGHTS

Delta Connection offer the highest number of flights for this route with departures times between 07:00 and 17:55.

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
06:00
AirlineFlight  No
Alaska AirlinesAS607
Hawaiian AirlinesHA6361
Qatar AirwaysQR2182
Jet Linx AviationJL6389
07:00
AirlineFlight  No
Korean AirKE3098
WestJetWS7840
KLMKL5993
Delta ConnectionDL3690
10:33
AirlineFlight  No
Alaska AirlinesAS654
Hawaiian AirlinesHA6371
IcelandairFI7707
Qatar AirwaysQR2186
11:53
AirlineFlight  No
KLMKL6941
Delta ConnectionDL4070
Virgin AtlanticVS5467
14:20
AirlineFlight  No
Delta ConnectionDL4170
Virgin AtlanticVS3853
17:55
AirlineFlight  No
Delta ConnectionDL4031
Virgin AtlanticVS4052
19:08
AirlineFlight  No
Alaska AirlinesAS594
Hawaiian AirlinesHA6358
VIEW FLIGHTS
Tuesday
06:00
AirlineFlight  No
Alaska AirlinesAS607
Hawaiian AirlinesHA6361
Qatar AirwaysQR2182
Jet Linx AviationJL6389
07:00
AirlineFlight  No
Korean AirKE3098
KLMKL5993
Delta ConnectionDL3690
10:33
AirlineFlight  No
Alaska AirlinesAS654
Hawaiian AirlinesHA6371
IcelandairFI7707
Qatar AirwaysQR2186
11:53
AirlineFlight  No
KLMKL6941
Delta ConnectionDL4070
Virgin AtlanticVS5467
14:20
AirlineFlight  No
Delta ConnectionDL4170
Virgin AtlanticVS3853
17:55
AirlineFlight  No
Delta ConnectionDL4031
Virgin AtlanticVS4052
19:08
AirlineFlight  No
Alaska AirlinesAS594
Hawaiian AirlinesHA6358
VIEW FLIGHTS
Wednesday
06:00
AirlineFlight  No
Alaska AirlinesAS607
Qatar AirwaysQR2182
Jet Linx AviationJL6389
07:00
AirlineFlight  No
Korean AirKE3098
KLMKL5993
Delta ConnectionDL3690
10:39
AirlineFlight  No
Alaska AirlinesAS654
IcelandairFI7707
Qatar AirwaysQR2186
11:53
AirlineFlight  No
KLMKL6941
Delta ConnectionDL4070
Virgin AtlanticVS5467
14:20
AirlineFlight  No
Delta ConnectionDL4170
Virgin AtlanticVS3853
15:26
AirlineFlight  No
Alaska AirlinesAS729
17:55
AirlineFlight  No
Delta ConnectionDL4031
Virgin AtlanticVS4052
23:00
AirlineFlight  No
Alaska AirlinesAS9806
VIEW FLIGHTS
Thursday
01:41
AirlineFlight  No
Alaska AirlinesAS9806
06:00
AirlineFlight  No
Alaska AirlinesAS607
Jet Linx AviationJL6389
07:00
AirlineFlight  No
Korean AirKE3098
WestJetWS7840
KLMKL5993
Delta ConnectionDL3690
10:39
AirlineFlight  No
Alaska AirlinesAS654
IcelandairFI7707
11:53
AirlineFlight  No
KLMKL6941
Delta ConnectionDL4070
Virgin AtlanticVS5467
14:20
AirlineFlight  No
Delta ConnectionDL4170
Virgin AtlanticVS3853
15:26
AirlineFlight  No
Alaska AirlinesAS729
17:55
AirlineFlight  No
Delta ConnectionDL4031
Virgin AtlanticVS4052
19:59
AirlineFlight  No
Alaska AirlinesAS594
Qatar AirwaysQR3345
VIEW FLIGHTS
Friday
06:00
AirlineFlight  No
Alaska AirlinesAS607
Qatar AirwaysQR2182
Jet Linx AviationJL6389
07:00
AirlineFlight  No
Korean AirKE3098
WestJetWS7840
KLMKL5993
Delta ConnectionDL3690
10:39
AirlineFlight  No
Alaska AirlinesAS654
IcelandairFI7707
Qatar AirwaysQR2186
11:53
AirlineFlight  No
KLMKL6941
Delta ConnectionDL4070
Virgin AtlanticVS5467
14:20
AirlineFlight  No
Delta ConnectionDL4170
Virgin AtlanticVS3853
15:26
AirlineFlight  No
Alaska AirlinesAS729
17:55
AirlineFlight  No
Delta ConnectionDL4031
Virgin AtlanticVS4052
19:59
AirlineFlight  No
Alaska AirlinesAS594
Qatar AirwaysQR3345
VIEW FLIGHTS
Saturday
06:00
AirlineFlight  No
Alaska AirlinesAS607
Qatar AirwaysQR2182
Jet Linx AviationJL6389
07:00
AirlineFlight  No
Korean AirKE3098
WestJetWS7840
KLMKL5993
Delta ConnectionDL3690
10:39
AirlineFlight  No
Alaska AirlinesAS654
IcelandairFI7707
Qatar AirwaysQR2186
11:53
AirlineFlight  No
KLMKL6941
Delta ConnectionDL4070
Virgin AtlanticVS5467
14:20
AirlineFlight  No
WestJetWS6767
Delta ConnectionDL4170
Virgin AtlanticVS3853
15:26
AirlineFlight  No
Alaska AirlinesAS729
17:55
AirlineFlight  No
Delta ConnectionDL4031
Virgin AtlanticVS4052
VIEW FLIGHTS
Sunday
06:00
AirlineFlight  No
Alaska AirlinesAS607
Qatar AirwaysQR2182
Jet Linx AviationJL6389
07:00
AirlineFlight  No
Korean AirKE3098
KLMKL5993
Delta ConnectionDL3690
10:39
AirlineFlight  No
Alaska AirlinesAS654
IcelandairFI7707
Qatar AirwaysQR2186
11:53
AirlineFlight  No
KLMKL6941
Delta ConnectionDL4070
Virgin AtlanticVS5467
14:20
AirlineFlight  No
WestJetWS6767
Delta ConnectionDL4170
Virgin AtlanticVS3853
15:26
AirlineFlight  No
Alaska AirlinesAS729
17:55
AirlineFlight  No
Delta ConnectionDL4031
Virgin AtlanticVS4052
19:59
AirlineFlight  No
Alaska AirlinesAS594
Qatar AirwaysQR3345
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 Delta
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 £57.80 ($78 €66.54)
£57.80
$78 | €66.54
Check Latest Price
DIRECT Alaska 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 £100.03 ($135 €115.16)
£100.03
$135 | €115.16
Check Latest Price
1+ STOP(S)
What is the cheapest flight one way from Ontario ONT to Seattle SEA?
The cheapest flight one way from Ontario ONT to Seattle SEA is £51.87 ($70 €59.71)
£51.87
$70 | €59.71
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, Hawaiian Airlines, 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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