Flights from Ontario Airport ONT to Seattle Airport SEA

We've found the cheapest flights to Seattle

Returns from £64.96

One-way from £29.39

If it is your first time travelling to Seattle-Tacoma International then check out the airliners Frontier, LATAM Airlines, Japan Airlines, ITA Airways, Jet Linx Aviation, Air France, Virgin Atlantic, Qatar Airways, Korean Air, Alaska Airlines, Hawaiian Airlines, Delta Connection, WestJet and KLM. These airliners all offer direct flights that depart from Ontario International, so you will find flying to Seattle-Tacoma International is quite easy. When travelling from Ontario International you will cover about 957 miles before you reach Seattle-Tacoma International. This journey will take 2 Hours 37 Minutes.

The price of the flight is dependent on the time of the day you fly and the day of the week with weekends being normally a higher price. If you are on a tight budget then you should avoid flying at peak hours as the prices are more expensive. The cheapest flights are in the evenings and in mid week. We advise all our viewers to book well in advance. This way you will get the low priced tickets available.

The table below displays the numbers of daily flights from Ontario International (ONT) to Seattle-Tacoma International (SEA) and the relevant airlines that fly.

Flights Chart
AirlinerMoTuWeThFrSaSuFirst FlightLast FlightFlights
KLM343444305:4017:30VIEW FLIGHTS
WestJet332344405:4017:30VIEW FLIGHTS
Delta Connection333333305:4017:30VIEW FLIGHTS
Hawaiian Airlines333332306:0019:17VIEW FLIGHTS
Korean Air232333205:4017:30VIEW FLIGHTS
Alaska Airlines322332306:0019:17VIEW FLIGHTS
Qatar Airways212222206:0011:57VIEW FLIGHTS
Virgin Atlantic122222111:4217:30VIEW FLIGHTS
Jet Linx Aviation111111006:0006:00VIEW FLIGHTS
Air France012111017:3017:30VIEW FLIGHTS
LATAM Airlines011111017:3017:30VIEW FLIGHTS
Japan Airlines010111106:0008:50VIEW FLIGHTS
ITA Airways011111017:3017:30VIEW FLIGHTS
Frontier100110110:2110:21VIEW FLIGHTS

KLM offer the highest number of flights for this route with departures times between 05:40 and 17:30.

You can find the latest flight availability and prices from KLM at klm.com. You can also book direct and get their latest discounts.

Flight times for the route are summarised in the table below. These time were correct at the time of writing, but please be aware that times may vary from time to time so please check their website for exact times and the dates you wish to fly.

Flights Time In WeekDays
DayFlight TimesFlights
Monday
05:40
AirlineFlight  No
Korean AirKE3098
WestJetWS8036
KLMKL6979
Delta ConnectionDL4042
06:00
AirlineFlight  No
Alaska AirlinesAS1091
Hawaiian AirlinesHA6185
Qatar AirwaysQR2987
Jet Linx AviationJL6389
10:21
AirlineFlight  No
FrontierF93164
11:42
AirlineFlight  No
WestJetWS7732
KLMKL6981
Delta ConnectionDL4070
Virgin AtlanticVS5467
11:57
AirlineFlight  No
Alaska AirlinesAS1255
Hawaiian AirlinesHA6206
Qatar AirwaysQR2048
17:30
AirlineFlight  No
Korean AirKE3070
WestJetWS8534
KLMKL6284
Delta ConnectionDL4031
19:14
AirlineFlight  No
Alaska AirlinesAS1399
Hawaiian AirlinesHA6184
VIEW FLIGHTS
Tuesday
05:40
AirlineFlight  No
Korean AirKE3098
WestJetWS8036
KLMKL6979
Delta ConnectionDL4042
06:00
AirlineFlight  No
Alaska AirlinesAS1091
Hawaiian AirlinesHA6185
Hawaiian AirlinesHA6288
Qatar AirwaysQR2987
Jet Linx AviationJL6389
08:50
AirlineFlight  No
Japan AirlinesJL6389
11:42
AirlineFlight  No
WestJetWS7732
KLMKL6981
Delta ConnectionDL4070
Virgin AtlanticVS5467
16:20
AirlineFlight  No
Alaska AirlinesAS1119
Hawaiian AirlinesHA6290
17:30
AirlineFlight  No
Korean AirKE3070
Korean AirKE7360
WestJetWS8534
Air FranceAF2133
KLMKL5455
KLMKL6284
ITA AirwaysAZ3408
LATAM AirlinesLA6297
Delta ConnectionDL4031
Virgin AtlanticVS4636
VIEW FLIGHTS
Wednesday
05:40
AirlineFlight  No
Korean AirKE3098
WestJetWS8036
KLMKL6979
Delta ConnectionDL4042
06:00
AirlineFlight  No
Alaska AirlinesAS1091
Hawaiian AirlinesHA6185
Hawaiian AirlinesHA6288
Qatar AirwaysQR2987
Jet Linx AviationJL6389
11:33
AirlineFlight  No
Alaska AirlinesAS1111
Hawaiian AirlinesHA6289
Qatar AirwaysQR2048
11:42
AirlineFlight  No
WestJetWS7732
KLMKL6981
Delta ConnectionDL4070
Virgin AtlanticVS5467
17:30
AirlineFlight  No
Korean AirKE7360
Air FranceAF2133
Air FranceAF8521
KLMKL5455
ITA AirwaysAZ3408
LATAM AirlinesLA6297
Delta ConnectionDL4031
Virgin AtlanticVS4636
VIEW FLIGHTS
Thursday
05:40
AirlineFlight  No
Korean AirKE3098
WestJetWS8036
KLMKL6979
Delta ConnectionDL4042
06:00
AirlineFlight  No
Alaska AirlinesAS1091
Hawaiian AirlinesHA6288
Qatar AirwaysQR2987
Jet Linx AviationJL6389
08:50
AirlineFlight  No
Japan AirlinesJL6389
10:21
AirlineFlight  No
FrontierF93164
11:33
AirlineFlight  No
Alaska AirlinesAS1111
Hawaiian AirlinesHA6289
Qatar AirwaysQR2048
11:42
AirlineFlight  No
WestJetWS7732
KLMKL6981
Delta ConnectionDL4070
Virgin AtlanticVS5467
17:30
AirlineFlight  No
Korean AirKE3070
Korean AirKE7360
WestJetWS8534
Air FranceAF8521
KLMKL5455
KLMKL6284
ITA AirwaysAZ3408
LATAM AirlinesLA6297
Delta ConnectionDL4031
Virgin AtlanticVS4636
19:17
AirlineFlight  No
Alaska AirlinesAS1087
Hawaiian AirlinesHA6107
VIEW FLIGHTS
Friday
05:40
AirlineFlight  No
Korean AirKE3098
WestJetWS8036
WestJetWS8146
KLMKL6979
Delta ConnectionDL4042
06:00
AirlineFlight  No
Alaska AirlinesAS1091
Hawaiian AirlinesHA6288
Qatar AirwaysQR2987
Jet Linx AviationJL6389
08:50
AirlineFlight  No
Japan AirlinesJL6389
10:21
AirlineFlight  No
FrontierF93164
11:33
AirlineFlight  No
Alaska AirlinesAS1111
Hawaiian AirlinesHA6289
Qatar AirwaysQR2048
11:42
AirlineFlight  No
WestJetWS7732
KLMKL6981
Delta ConnectionDL4070
Virgin AtlanticVS5467
17:30
AirlineFlight  No
Korean AirKE3070
Korean AirKE7360
WestJetWS8534
Air FranceAF2133
KLMKL5455
KLMKL6284
ITA AirwaysAZ3408
LATAM AirlinesLA6297
Delta ConnectionDL4031
Virgin AtlanticVS4636
19:17
AirlineFlight  No
Alaska AirlinesAS1087
Hawaiian AirlinesHA6107
VIEW FLIGHTS
Saturday
05:40
AirlineFlight  No
Korean AirKE3098
WestJetWS8036
WestJetWS8146
KLMKL6979
Delta ConnectionDL4042
06:00
AirlineFlight  No
Alaska AirlinesAS1091
Hawaiian AirlinesHA6288
Qatar AirwaysQR2987
Jet Linx AviationJL6389
08:50
AirlineFlight  No
Japan AirlinesJL6389
11:33
AirlineFlight  No
Alaska AirlinesAS1111
Hawaiian AirlinesHA6289
Qatar AirwaysQR2048
11:42
AirlineFlight  No
WestJetWS7732
KLMKL6981
Delta ConnectionDL4070
Virgin AtlanticVS5467
17:30
AirlineFlight  No
Korean AirKE3070
Korean AirKE7360
WestJetWS7083
Air FranceAF2133
KLMKL5455
KLMKL6284
ITA AirwaysAZ3408
LATAM AirlinesLA6297
Delta ConnectionDL4031
Virgin AtlanticVS4636
VIEW FLIGHTS
Sunday
05:40
AirlineFlight  No
Korean AirKE3098
WestJetWS8036
WestJetWS8146
KLMKL6979
Delta ConnectionDL4042
06:00
AirlineFlight  No
Alaska AirlinesAS1091
Hawaiian AirlinesHA6288
Japan AirlinesJL6389
Qatar AirwaysQR2987
10:21
AirlineFlight  No
FrontierF93164
11:33
AirlineFlight  No
Alaska AirlinesAS1111
Hawaiian AirlinesHA6289
Qatar AirwaysQR2048
11:42
AirlineFlight  No
WestJetWS7732
KLMKL6981
Delta ConnectionDL4070
Virgin AtlanticVS5467
17:30
AirlineFlight  No
Korean AirKE3070
WestJetWS7083
KLMKL6284
Delta ConnectionDL4031
19:17
AirlineFlight  No
Alaska AirlinesAS1087
Hawaiian AirlinesHA6107
VIEW FLIGHTS

Instead of flying from Ontario International you could consider a few airports that are close by. Please see that table below of alternative routes.

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
Palm Springs Bermuda Dunes to Seattle02 Hours 42 Minutes

Whilst you will find a bureau de change at Seattle-Tacoma International, we recommend you change some money before you depart if you don’t have the local currency. The exchange rates within any airport are not very favorable, so exchanging money before hand is a good idea.

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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 £29.39 ($38 €35.27)
£29.39
$38 | €35.27
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 £64.96 ($84 €77.97)
£64.96
$84 | €77.97
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): Air France, Alaska Airlines, Delta Connection, Frontier, Hawaiian Airlines, ITA Airways, Japan Airlines, Jet Linx Aviation, KLM, Korean Air, LATAM Airlines, 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.

Alternative Airports in United States with Connections from Ontario Airport

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Useful Information about Ontario Airport

Lounges at Ontario Airport

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Eating and Drinking at Ontario Airport

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Duty Free Shopping at Ontario Airport

See all shops available at Ontario Airport - plan your duty free shopping in advance

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Ontario Tourist Attractions

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