Cheap flights from Seattle to Ontario from $86

Round-trip
1 adult
Economy
From?
To?
Sun 7/3
Sun 7/10

Deals available from 900+ travel sites.

Flight information for Seattle to Ontario
(SEA to ONT)

Find info about flight duration, direct flights, and airports for your flight from Seattle to Ontario

Best Price Found

$86

Fastest flight time

2h 35m

Direct flights

Wed and Sat

Airports in Ontario

1 airport
The best one-way flight to Ontario from Seattle in the past 72 hours is $86. The best round-trip flight deal from Seattle to Ontario found on momondo in the last 72 hours is $178.
The fastest flight from Seattle to Ontario takes 2h 35m
Direct flights go from Seattle to Ontario on Wednesday and Saturday. Airlines offering direct flights are: Delta, Alaska Airlines and KLM.
There is 1 airport near Ontario: Ontario (ONT)

How to get the cheapest flight ticket from Seattle to Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly from Seattle to Ontario?

September

The cheapest time of year to fly to Ontario from Seattle is September. Most expensive is April

What is the cheapest day to depart Seattle for Ontario?

Wednesday

The cheapest day of the week is typically Wednesday. The most expensive is typically Sunday

When is the cheapest time to fly from Seattle to Ontario?

in the afternoon

Seattle to Ontario flights are approximately 34% more expensive at noon than in the afternoon

What is the cheapest airline that flies to Ontario from Seattle?

Juneyao Airlines

Alaska Airlines, Delta, and Juneyao Airlines are the most popular carriers operating from Seattle to Ontario

What is the cheapest Seattle to Ontario flight route?

Seattle/Tacoma Intl - Ontario

Fly from Seattle/Tacoma Intl to Ontario for the best Seattle - Ontario flight prices

How far in advance should you book Seattle to Ontario flights?

56 days before

The cheapest time to buy a flight from Seattle to Ontario is approximately 56 days to departure

If you are looking to fly from Seattle to Ontario, you are most likely going to fly from Seattle/Tacoma Intl Airport to Ontario Airport, the most popular airports on that route. If you are looking for an alternate airport near Seattle/Tacoma Intl Airport, Everett Paine Field Airport is a great option and is located in Everett. You may be looking for an airport near Ontario Airport to land at when traveling from Seattle and luckily, there are options! You can try Los Angeles Airport which is located in Los Angeles, Santa Ana J. Wayne/Orange Cnty Airport which is located in Santa Ana, or Burbank Bob Hope Airport which is located in Burbank. The cheapest route from Seattle to Ontario is SEA — SNA with an average price of $160 RT during the month of June.

Seattle/Tacoma Intl Airport (SEA) to Los Angeles Airport (LAX)$178
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Seattle/Tacoma Intl Airport (SEA) to Santa Ana J. Wayne/Orange Cnty Airport (SNA)$160
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Seattle/Tacoma Intl Airport (SEA) to Ontario Airport (ONT)$178
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Seattle/Tacoma Intl Airport (SEA) to Burbank Bob Hope Airport (BUR)$198
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Everett Paine Field Airport (PAE) to Santa Ana J. Wayne/Orange Cnty Airport (SNA)$238
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Everett Paine Field Airport (PAE) to Los Angeles Airport (LAX)$234
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Easily compare round-trip flights from Seattle to Ontario

Below you can see the best fares for your round-trip flight route over the next three months. All fares were found on momondo this week. Browse the quickest and cheapest flights from Seattle to Ontario by changing tabs
Alaska Airlines
Sep 21
SEA2:00 amSeattle/Tacoma Intl
2h 35m
ONT4:35 amOntario
Sep 27
ONT4:30 pmOntario
2h 45m
SEA7:15 pmSeattle/Tacoma Intl
Multiple Airlines
Nov 1
SEA5:20 amSeattle/Tacoma Intl
5h 07m
1 stop
ONT10:27 amOntario
Nov 12
ONT12:56 pmOntario
2h 44m
SEA3:40 pmSeattle/Tacoma Intl
Frontier
Aug 25
SEA5:14 pmSeattle/Tacoma Intl
20h 16m
1 stop
ONT1:30 pmOntario
Aug 28
ONT2:52 pmOntario
24h 00m
1 stop
SEA2:52 pmSeattle/Tacoma Intl
Major Airline
Dec 13
SEA1:25 amSeattle/Tacoma Intl
2h 34m
ONT3:59 amOntario
Dec 19
ONT8:05 pmOntario
2h 47m
SEA10:52 pmSeattle/Tacoma Intl
Alaska Airlines
Dec 13
SEA10:55 amSeattle/Tacoma Intl
2h 30m
ONT1:25 pmOntario
Dec 20
ONT2:20 pmOntario
2h 47m
SEA5:07 pmSeattle/Tacoma Intl
Multiple Airlines
Aug 30
SEA12:16 pmSeattle/Tacoma Intl
7h 50m
1 stop
ONT8:06 pmOntario
Sep 14
ONT4:30 pmOntario
2h 45m
SEA7:15 pmSeattle/Tacoma Intl

Find the cheapest one-way flights from Seattle to Ontario

If you're looking for one-way flights from Seattle to Ontario, view some of our deals below provided by Alaska Airlines, Delta and Frontier
Frontier
Aug 25
SEA5:14 pmSeattle/Tacoma Intl
13h 42m
1 stop
ONT6:56 amOntario
Delta
Sep 13
SEA4:15 amSeattle/Tacoma Intl
2h 45m
ONT7:00 amOntario
Alaska Airlines
Oct 7
SEA3:00 amSeattle/Tacoma Intl
2h 35m
ONT5:35 amOntario

Search last-minute flights to Ontario from Seattle

Find and compare round-trip flight prices for your last-minute flight from Seattle to Ontario
Frontier
Jul 7
SEA5:14 pmSeattle/Tacoma Intl
20h 16m
1 stop
ONT1:30 pmOntario
Jul 15
ONT2:43 pmOntario
15h 24m
1 stop
SEA6:07 amSeattle/Tacoma Intl
Multiple Airlines
Jul 7
SEA5:14 pmSeattle/Tacoma Intl
20h 16m
1 stop
ONT1:30 pmOntario
Jul 13
ONT8:06 amOntario
2h 39m
SEA10:45 amSeattle/Tacoma Intl
United Airlines
Jul 8
SEA3:00 amSeattle/Tacoma Intl
5h 14m
1 stop
ONT8:14 amOntario
Jul 11
ONT2:45 pmOntario
6h 00m
1 stop
SEA8:45 pmSeattle/Tacoma Intl
Alaska Airlines
Jul 8
SEA4:30 pmSeattle/Tacoma Intl
2h 35m
ONT7:05 pmOntario
Jul 13
ONT6:00 amOntario
2h 35m
SEA8:35 amSeattle/Tacoma Intl
Delta
Jul 6
SEA1:24 pmSeattle/Tacoma Intl
4h 31m
1 stop
ONT5:55 pmOntario
Jul 16
ONT1:38 pmOntario
2h 42m
SEA4:20 pmSeattle/Tacoma Intl
Multiple Airlines
Jul 7
SEA2:00 amSeattle/Tacoma Intl
10h 24m
1 stop
ONT12:24 pmOntario
Jul 11
ONT2:44 pmOntario
16h 25m
1 stop
SEA7:09 amSeattle/Tacoma Intl

Best airlines flying from Seattle to Ontario

Compare and see reviews for airlines that fly from Seattle to Ontario with momondo
AirlineRatingFree CancellationPrice
Juneyao AirlinesPriceFrom $14Free CancellationRating
0.0
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United AirlinesPriceFrom $71Free CancellationRating
7.2
7.5

Boarding

7.1

Comfort

8.0

Crew

6.9

Entertainment

6.5

Food

Reviews

Connection time was inadequate causing us to miss our flight. Frankfurt required at least 2 1/2 hours for a connection but you only gave us 80 and 45 minutes. We had to pay to rebook our returning connection in order to make it in time for our return flight home. Costing us $600 for rebooking our connection to Frankfurt plus a Frankfurt hotel.

1 / 10
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Alaska AirlinesPriceFrom $89Free CancellationRating
7.9
8.2

Boarding

7.9

Comfort

8.5

Crew

7.2

Entertainment

7.1

Food

Reviews

I liked the crew. The seats were a bit tight, I did not like that

1 / 10
Search Alaska Airlines flights
DeltaPriceFrom $91Free CancellationRating
7.8
7.9

Boarding

8.0

Comfort

8.3

Crew

7.7

Entertainment

7.3

Food

Reviews

It was so cold on the flight, otherwise okay.

1 / 10
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  • Alaska Airlines Flights From Seattle to Ontario

    Alaska Airlines flies from Seattle to Ontario around 20 times per week, with 663 momondo users rating the airline 7.9/10. The cheapest Alaska Airlines deal from Seattle to Ontario in the last 72 hours was $89 (round-trip), much lower than the average airfare cost of $208 for Alaska Airlines flights on this route.

  • Delta Flights From Seattle to Ontario

    Delta (7.8/10 from 392 reviews) operates around 20 flights from Seattle to Ontario in any given week. The average Delta airfare for this route is around $272, with deals from around $91 rare but found on momondo. Referenced prices are for round-trip Seattle to Ontario flight searches in the last 72 hours.


Alaska Airlines flights from Seattle to Ontario

Our best Alaska Airlines deals on Seattle to Ontario flight tickets
Alaska Airlines
Sep 21
SEA2:00 amSeattle/Tacoma Intl
2h 35m
ONT4:35 amOntario
Sep 27
ONT4:30 pmOntario
2h 45m
SEA7:15 pmSeattle/Tacoma Intl
Alaska Airlines
Dec 13
SEA10:55 amSeattle/Tacoma Intl
2h 30m
ONT1:25 pmOntario
Dec 20
ONT2:20 pmOntario
2h 47m
SEA5:07 pmSeattle/Tacoma Intl
Alaska Airlines
Sep 20
SEA2:00 amSeattle/Tacoma Intl
2h 35m
ONT4:35 amOntario
Sep 23
ONT4:30 pmOntario
2h 45m
SEA7:15 pmSeattle/Tacoma Intl

Frontier flights from Seattle to Ontario

Our best Frontier deals on Seattle to Ontario flight tickets
Frontier
Aug 25
SEA5:14 pmSeattle/Tacoma Intl
20h 16m
1 stop
ONT1:30 pmOntario
Aug 28
ONT2:52 pmOntario
24h 00m
1 stop
SEA2:52 pmSeattle/Tacoma Intl
Frontier
Aug 25
SEA5:14 pmSeattle/Tacoma Intl
13h 42m
1 stop
ONT6:56 amOntario
Aug 30
ONT6:33 amOntario
8h 53m
1 stop
SEA3:26 pmSeattle/Tacoma Intl
Frontier
Jul 7
SEA5:14 pmSeattle/Tacoma Intl
20h 16m
1 stop
ONT1:30 pmOntario
Jul 15
ONT2:43 pmOntario
15h 24m
1 stop
SEA6:07 amSeattle/Tacoma Intl

  • Are airlines flying from Seattle/Tacoma Intl to Ontario offering flexible cancellation due to COVID-19?

    Some of our partner airlines flying from Seattle/Tacoma Intl to Ontario are adopting new policies due to the global impact of COVID-19. Some of the airlines that may be waiving their cancellation fees are Alaska Airlines, Delta, and Juneyao Airlines. You can search for the full list of airlines like Alaska Airlines that are offering this flexibility.

  • How far is Seattle/Tacoma Intl to Ontario by plane?

    The distance between Seattle/Tacoma Intl and Ontario is about 966.6 mi. A reasonable flight in good conditions will take 2h 30m.



Alternative routes for Seattle to Ontario

Compare alternative flights to and from nearby airports and cities to discover the best prices and most convenient flight times
Seattle to Los Angeles Flights
Fastest flight time2h 32m
Cheapest price$178
Seattle to San Diego Flights
Fastest flight time2h 41m
Cheapest price$198
Seattle to San Francisco Flights
Fastest flight time2h 05m
Cheapest price$138
Seattle to Santa Ana Flights
Fastest flight time2h 39m
Cheapest price$160
Seattle to San Jose Flights
Fastest flight time2h 07m
Cheapest price$172
Seattle to Burbank Flights
Fastest flight time2h 28m
Cheapest price$198
Seattle to Sacramento Flights
Fastest flight time1h 50m
Cheapest price$168
Seattle to Palm Springs Flights
Fastest flight time2h 40m
Cheapest price$218
Seattle to Reno Flights
Fastest flight time1h 41m
Cheapest price$172
Seattle to Oakland, California Flights
Fastest flight time2h 03m
Cheapest price$158
Seattle to Long Beach Flights
Fastest flight time4h 38m
Cheapest price$198
Spokane to Los Angeles Flights
Fastest flight time2h 44m
Cheapest price$198

Similar Seattle to Ontario flights

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Why use momondo?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Seattle to Ontario for you.

Yes. momondo allows you to filter the results for Seattle to Ontario flights to just show those with flexible booking policies.

momondo helps you find the best flight between Seattle and Ontario by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

Price alerts on flights to Ontario from Seattle are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.


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