Flights from Seattle Airport SEA to Ontario Airport ONT

We've found the cheapest flights to Ontario

Returns from £98.91

One-way from £53.81

A variety of 11 airline companies have direct flights to Ontario International to Seattle-Tacoma International, Alaska SkyWest, Alaska Horizon, Japan Airlines, Virgin Atlantic, Jet Linx Aviation, Qatar Airways, Korean Air, KLM, WestJet, Alaska Airlines and Delta Connection. The distance covered when flying from Seattle-Tacoma International to Ontario International United States is 1,540 Km (957 Miles) with the travel time being around 2 Hours 37 Minutes. SEA is the Airport code for Seattle-Tacoma International and ONT is for Ontario International United States.

The cost of ticket prices to Ontario International United States can vary quite considerably if you travel at certain times of the week especially at weekends. It is normally worth booking flights well in advance if possible to get the best deal to Ontario International United States perhaps midweek or late evening. Please book in advance if you want to take advantage of the best prices airlines have to offer as prices normally increase as time goes on.

Below you can see a table that shows the airlines that fly from Seattle-Tacoma International (SEA) to Ontario International (ONT) and frequency of flights daily.

Flights Chart
AirlinerMoTuWeThFrSaSuFirst FlightLast FlightFlights
Delta Connection444444410:4022:40VIEW FLIGHTS
Alaska Airlines422442309:3323:59VIEW FLIGHTS
WestJet222333217:0017:00VIEW FLIGHTS
Qatar Airways311331219:0423:59VIEW FLIGHTS
Korean Air222222217:0022:40VIEW FLIGHTS
KLM222222217:0022:40VIEW FLIGHTS
Virgin Atlantic111111122:4022:40VIEW FLIGHTS
Jet Linx Aviation111111115:4616:05VIEW FLIGHTS
Japan Airlines111111013:1313:32VIEW FLIGHTS
Alaska SkyWest011000009:3309:33VIEW FLIGHTS
Alaska Horizon000001115:4815:48VIEW FLIGHTS

Delta Connection offer the most direct flights from Seattle-Tacoma International to Ontario International with an average of 28 flights a week. The earliest flights are operated at 10:40 and the latest flights operated at 22:40 and the most common flight numbers are DL4016, DL4020, DL4031 and DL4032

For more details regarding Delta Connection flight information and bookings you can visit them at www.google.com/search?q=Delta Connection

Please see below the times of flights. These times and frequency may vary at different times of the year please visit the website for more information.

Flights Time In WeekDays
DayFlight TimesFlights
Monday
09:33
AirlineFlightNo
Alaska AirlinesAS1254
10:40
AirlineFlightNo
Delta ConnectionDL4020
13:12
AirlineFlightNo
Delta ConnectionDL4016
13:32
AirlineFlightNo
Japan AirlinesJL6388
16:05
AirlineFlightNo
Alaska AirlinesAS1097
Jet Linx AviationJL6388
17:00
AirlineFlightNo
Korean AirKE3070
WestJetWS6873
WestJetWS6880
KLMKL5150
Delta ConnectionDL4032
19:04
AirlineFlightNo
Alaska AirlinesAS1086
Qatar AirwaysQR2105
22:40
AirlineFlightNo
Korean AirKE3106
KLMKL6240
Delta ConnectionDL4031
Virgin AtlanticVS5376
23:59
AirlineFlightNo
Alaska AirlinesAS1040
Qatar AirwaysQR2146
Qatar AirwaysQR4277
VIEW FLIGHTS
Tuesday
09:33
AirlineFlightNo
Alaska SkyWestAS3452
10:40
AirlineFlightNo
Delta ConnectionDL4020
13:12
AirlineFlightNo
Delta ConnectionDL4016
13:32
AirlineFlightNo
Japan AirlinesJL6388
16:05
AirlineFlightNo
Alaska AirlinesAS1097
Jet Linx AviationJL6388
17:00
AirlineFlightNo
Korean AirKE3070
WestJetWS6838
WestJetWS6873
KLMKL5150
Delta ConnectionDL4032
21:28
AirlineFlightNo
Alaska AirlinesAS1088
Qatar AirwaysQR2105
22:40
AirlineFlightNo
Korean AirKE3106
KLMKL6240
Delta ConnectionDL4031
Virgin AtlanticVS5376
VIEW FLIGHTS
Wednesday
09:33
AirlineFlightNo
Alaska SkyWestAS3452
10:40
AirlineFlightNo
Delta ConnectionDL4020
13:12
AirlineFlightNo
Delta ConnectionDL4016
13:32
AirlineFlightNo
Japan AirlinesJL6388
16:05
AirlineFlightNo
Alaska AirlinesAS1097
Jet Linx AviationJL6388
17:00
AirlineFlightNo
Korean AirKE3070
WestJetWS6789
WestJetWS6838
KLMKL5150
Delta ConnectionDL4032
21:28
AirlineFlightNo
Alaska AirlinesAS1088
Qatar AirwaysQR2105
22:40
AirlineFlightNo
Korean AirKE3106
KLMKL6240
Delta ConnectionDL4031
Virgin AtlanticVS5376
VIEW FLIGHTS
Thursday
09:33
AirlineFlightNo
Alaska AirlinesAS1254
10:40
AirlineFlightNo
Delta ConnectionDL4020
13:12
AirlineFlightNo
Delta ConnectionDL4016
13:32
AirlineFlightNo
Japan AirlinesJL6388
16:05
AirlineFlightNo
Alaska AirlinesAS1097
Jet Linx AviationJL6388
17:00
AirlineFlightNo
Korean AirKE3070
WestJetWS6789
WestJetWS6838
WestJetWS6869
KLMKL5150
Delta ConnectionDL4032
19:04
AirlineFlightNo
Alaska AirlinesAS1086
Qatar AirwaysQR2105
22:40
AirlineFlightNo
Korean AirKE3106
KLMKL6240
Delta ConnectionDL4031
Virgin AtlanticVS5376
23:59
AirlineFlightNo
Alaska AirlinesAS1040
Qatar AirwaysQR2146
Qatar AirwaysQR4277
VIEW FLIGHTS
Friday
09:33
AirlineFlightNo
Alaska AirlinesAS1254
10:40
AirlineFlightNo
Delta ConnectionDL4020
13:12
AirlineFlightNo
Delta ConnectionDL4016
13:13
AirlineFlightNo
Japan AirlinesJL6388
15:46
AirlineFlightNo
Alaska AirlinesAS1097
Jet Linx AviationJL6388
17:00
AirlineFlightNo
Korean AirKE3070
WestJetWS6713
WestJetWS6789
WestJetWS6869
KLMKL5150
Delta ConnectionDL4032
19:04
AirlineFlightNo
Alaska AirlinesAS1086
Qatar AirwaysQR2105
22:40
AirlineFlightNo
Korean AirKE3106
KLMKL6240
Delta ConnectionDL4031
Virgin AtlanticVS5376
23:59
AirlineFlightNo
Alaska AirlinesAS1040
Qatar AirwaysQR2146
Qatar AirwaysQR4277
VIEW FLIGHTS
Saturday
09:33
AirlineFlightNo
Alaska HorizonAS2055
10:40
AirlineFlightNo
Delta ConnectionDL4020
13:12
AirlineFlightNo
Delta ConnectionDL4016
13:32
AirlineFlightNo
Japan AirlinesJL6388
16:05
AirlineFlightNo
Alaska AirlinesAS1097
Jet Linx AviationJL6388
17:00
AirlineFlightNo
Korean AirKE3070
WestJetWS6713
WestJetWS6869
WestJetWS7040
KLMKL5150
Delta ConnectionDL4032
21:28
AirlineFlightNo
Alaska AirlinesAS1088
Qatar AirwaysQR2105
22:40
AirlineFlightNo
Korean AirKE3106
KLMKL6240
Delta ConnectionDL4031
Virgin AtlanticVS5376
VIEW FLIGHTS
Sunday
09:33
AirlineFlightNo
Alaska AirlinesAS1254
10:40
AirlineFlightNo
Delta ConnectionDL4020
13:12
AirlineFlightNo
Delta ConnectionDL4016
15:48
AirlineFlightNo
Jet Linx AviationJL6388
Alaska HorizonAS2175
17:00
AirlineFlightNo
Korean AirKE3070
WestJetWS6713
WestJetWS7040
KLMKL5150
Delta ConnectionDL4032
19:04
AirlineFlightNo
Alaska AirlinesAS1086
Qatar AirwaysQR2105
22:40
AirlineFlightNo
Korean AirKE3106
KLMKL6240
Delta ConnectionDL4031
Virgin AtlanticVS5376
23:59
AirlineFlightNo
Alaska AirlinesAS1040
Qatar AirwaysQR2146
VIEW FLIGHTS

Don’t forget that flight regulations are getting tight so we recommend you leave plenty of time to get through customs at Seattle-Tacoma International.

Looking for the best deals on rental cars?

Search for cheap vehicle hire in Seattle

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

DIRECT Delta
What is the cheapest direct flight one way from Seattle SEA to Ontario ONT?
The cheapest direct flight one way from Seattle SEA to Ontario ONT is £53.81 ($68 €63.54)
£53.81
$68 | €63.54
Check Latest Price
DIRECT Alaska Airlines
What is the cheapest direct return flight from Seattle SEA to Ontario ONT?
The cheapest direct return flight from Seattle SEA to Ontario ONT is £98.91 ($125 €116.79)
£98.91
$125 | €116.79
Check Latest Price
1+ STOP(S)
What is the cheapest flight one way from Seattle SEA to Ontario ONT?
The cheapest flight one way from Seattle SEA to Ontario ONT is £39.57 ($50 €46.72)
£39.57
$50 | €46.72
Check Latest Price
1+ STOP(S)
What is the cheapest return flight from Seattle SEA to Ontario ONT?
The cheapest return flight from Seattle SEA to Ontario ONT is £75.96 ($96 €89.70)
£75.96
$96 | €89.70
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 SEA to ONT

Was your flight delayed or cancelled?

Was your flight delayed or cancelled?

You may be eligible to receive up to 600 EUR compensation per person in your party.

Claim Now!

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

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

Alternative Airports in United States with Connections from Seattle Airport

Planning a Holiday or Business Trip?

Find cheap car hire deals at SEA

Useful Information about Seattle Airport

Lounges at Seattle Airport

See all the airport lounges, locations and opening times available at Seattle Airport

View...
Eating and Drinking at Seattle Airport

See all bars and restaurants at Seattle Airport, including locations and if they are before or after check-in

View...
Duty Free Shopping at Seattle Airport

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

View...
Seattle Tourist Attractions

From wine tasting to a coffee & chocolate walking tour, just some of the things to see in Seattle..

View...