Cheap flights from Ontario to Seattle from $39

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週一 12/11
週一 12/18

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Flight information for Ontario to Seattle
(ONT to SEA)

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

Best Price Found

$39

Fastest flight time

2h 38m

Direct flights

None

Airports in Seattle

1 airport
The best one-way flight to Seattle from Ontario in the past 72 hours is $39. The best round-trip flight deal from Ontario to Seattle found on momondo in the last 72 hours is $76.
The fastest flight from Ontario to Seattle takes 2h 38m
There are no direct flights from Ontario to Seattle. Popular non-direct route for this connection is Ontario Airport - Seattle/Tacoma Intl Airport.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)

How to get the cheapest flight ticket from Ontario to Seattle

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 Ontario to Seattle?

January. The cheapest time of year to fly to Seattle from Ontario is January. Most expensive is June

What is the cheapest day to depart Ontario for Seattle?

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

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

At noon. Ontario to Seattle flights are approximately 18% more expensive in the morning than at noon

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

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

What is the cheapest Ontario to Seattle flight route?

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

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

60 days before. The cheapest time to buy a flight from Ontario to Seattle is approximately 60 days to departure

How many flights depart from Ontario to Seattle on average per day?

The number of flights available between Ontario and Seattle is 12 per day as of December 2023. The most frequent departure time is 4:00AM, with 61% of daily flights leaving in the morning.

How many flights depart from Ontario to Seattle on average per week?

As of December 2023, there are 86 flights per week flying from Ontario to Seattle. The most common day of the week flights depart is Monday, with 17% of flights taking off on this day.

What cabin class options are available on Ontario to Seattle flights?

There are 2 cabin classes available to choose from on Ontario to Seattle flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

When traveling from Ontario to Seattle, the most popular airport to fly into is Seattle/Tacoma Intl Airport. The majority of travelers flying into Seattle/Tacoma Intl Airport from Ontario are departing from Ontario Airport. You may be looking for an airport near Ontario Airport to depart from when traveling to 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. When traveling from Ontario, it is helpful to have an alternative airport to fly into when you land in Seattle. The nearest airport to Seattle/Tacoma Intl Airport is Everett Paine Field Airport which is located in Everett. The cheapest route from Ontario to Seattle is LAX — SEA with an average price of $67 RT during the month of December.

Los Angeles Airport (LAX) to Seattle/Tacoma Intl Airport (SEA)$67
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Ontario Airport (ONT) to Seattle/Tacoma Intl Airport (SEA)$78
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Santa Ana J. Wayne/Orange Cnty Airport (SNA) to Seattle/Tacoma Intl Airport (SEA)$68
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Burbank Bob Hope Airport (BUR) to Seattle/Tacoma Intl Airport (SEA)$68
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Los Angeles Airport (LAX) to Everett Paine Field Airport (PAE)$138
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Santa Ana J. Wayne/Orange Cnty Airport (SNA) to Everett Paine Field Airport (PAE)$178
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Easily compare round-trip flights from Ontario to Seattle

Below you can see the best fares for your round-trip flight route over the next six months. All fares were found on momondo this week. Browse the quickest and cheapest flights from Ontario to Seattle by changing tabs
Frontier
Jan 10
ONT1:22 pmOntario
21h 31m
1 stop
SEA10:53 amSeattle/Tacoma Intl
Jan 16
SEA3:03 pmSeattle/Tacoma Intl
9h 21m
1 stop
ONT12:24 amOntario
Multiple Airlines
Feb 6
ONT1:15 pmOntario
7h 55m
1 stop
SEA9:10 pmSeattle/Tacoma Intl
Feb 13
SEA9:42 amSeattle/Tacoma Intl
7h 08m
1 stop
ONT4:50 pmOntario
Frontier
Jan 11
ONT10:49 pmOntario
10h 04m
1 stop
SEA8:53 amSeattle/Tacoma Intl
Jan 14
SEA8:13 pmSeattle/Tacoma Intl
28h 33m
1 stop
ONT12:46 amOntario
Frontier
Jan 13
ONT3:07 pmOntario
18h 31m
1 stop
SEA9:38 amSeattle/Tacoma Intl
Jan 15
SEA10:13 amSeattle/Tacoma Intl
25h 37m
1 stop
ONT11:50 amOntario
Frontier
Jan 19
ONT5:40 pmOntario
22h 19m
1 stop
SEA3:59 pmSeattle/Tacoma Intl
Jan 20
SEA9:14 pmSeattle/Tacoma Intl
9h 53m
1 stop
ONT7:07 amOntario
Delta
Jan 12
ONT5:35 amOntario
2h 57m
SEA8:32 amSeattle/Tacoma Intl
Jan 15
SEA8:55 pmSeattle/Tacoma Intl
2h 33m
ONT11:28 pmOntario

Find the cheapest one-way flights from Ontario to Seattle

If you're looking for one-way flights from Ontario to Seattle, view some of our deals below provided by Alaska Airlines and Frontier
Frontier
Jan 17
ONT5:55 amOntario
8h 07m
1 stop
SEA2:02 pmSeattle/Tacoma Intl
Multiple Airlines
Jan 22
ONT1:15 pmOntario
19h 37m
1 stop
SEA8:52 amSeattle/Tacoma Intl
Alaska Airlines
Feb 10
ONT10:25 amOntario
2h 50m
SEA1:15 pmSeattle/Tacoma Intl

Search last-minute flights to Seattle from Ontario

Find and compare round-trip flight prices for your last-minute flight from Ontario to Seattle
Frontier
Dec 14
ONT1:12 pmOntario
19h 05m
1 stop
SEA8:17 amSeattle/Tacoma Intl
Dec 18
SEA8:42 pmSeattle/Tacoma Intl
15h 45m
1 stop
ONT12:27 pmOntario
Multiple Airlines
Dec 12
ONT7:59 amOntario
8h 01m
1 stop
SEA4:00 pmSeattle/Tacoma Intl
Dec 12
SEA10:18 pmSeattle/Tacoma Intl
13h 14m
1 stop
ONT11:32 amOntario
Frontier
Dec 12
ONT7:59 amOntario
8h 01m
1 stop
SEA4:00 pmSeattle/Tacoma Intl
Jan 5
SEA9:53 amSeattle/Tacoma Intl
11h 34m
1 stop
ONT9:27 pmOntario
Multiple Airlines
Dec 13
ONT12:22 pmOntario
9h 06m
1 stop
SEA9:28 pmSeattle/Tacoma Intl
Dec 19
SEA10:18 pmSeattle/Tacoma Intl
14h 44m
1 stop
ONT1:02 pmOntario
Delta
Dec 15
ONT5:40 amOntario
3h 02m
SEA8:42 amSeattle/Tacoma Intl
Dec 29
SEA3:20 pmSeattle/Tacoma Intl
2h 39m
ONT5:59 pmOntario
Frontier
Dec 16
ONT5:45 amOntario
26h 32m
1 stop
SEA8:17 amSeattle/Tacoma Intl
Jan 4
SEA11:44 amSeattle/Tacoma Intl
9h 07m
1 stop
ONT8:51 pmOntario

Best airlines flying from Ontario to Seattle

Compare and see reviews for airlines that fly from Ontario to Seattle with momondo
Airline
Rating
Free Cancellation
Price
JetBluePriceFrom $70Free CancellationRating
6.9
1,104 reviews
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FrontierPriceFrom $83Free CancellationRating
5.8
1,042 reviews
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DeltaPriceFrom $84Free CancellationRating
7.8
1,571 reviews
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Alaska AirlinesPriceFrom $90Free CancellationRating
7.9
3,005 reviews
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Spirit AirlinesPriceFrom $93Free CancellationRating
6.0
2,813 reviews
Search Spirit Airlines flights
United AirlinesPriceFrom $133Free CancellationRating
7.2
2,731 reviews
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American AirlinesPriceFrom $270Free CancellationRating
7.1
2,903 reviews
Search American Airlines flights
  • Alaska Airlines Flights From Ontario to Seattle

    Alaska Airlines flight deals from Ontario to Seattle start from $90 round-trip. Over the 14 Alaska Airlines flights for this route in a normal week, average airfare is usually $218 round-trip - but some users have found much cheaper deals with momondo.

  • Delta Flights From Ontario to Seattle

    $84 is the best Delta flight deal from Ontario to Seattle found on momondo over the last 72 hours. The average Delta ticket price found was closer to $218, however, with flight time and availability significantly affecting the price. Delta (7.8/10 from 1,571 user reviews) flies into Seattle from Ontario 21 times in an average week so prices can vary.


Alaska Airlines flights from Ontario to Seattle

Our best Alaska Airlines deals on Ontario to Seattle flight tickets
Alaska Airlines
Jan 19
ONT6:00 amOntario
2h 54m
SEA8:54 amSeattle/Tacoma Intl
Jan 23
SEA1:35 pmSeattle/Tacoma Intl
6h 20m
1 stop
ONT7:55 pmOntario
Alaska Airlines
Jan 8
ONT4:42 pmOntario
2h 51m
SEA7:33 pmSeattle/Tacoma Intl
Jan 15
SEA6:46 amSeattle/Tacoma Intl
2h 30m
ONT9:16 amOntario
Alaska Airlines
Jan 9
ONT4:45 pmOntario
21h 48m
1 stop
SEA2:33 pmSeattle/Tacoma Intl
Jan 18
SEA1:14 pmSeattle/Tacoma Intl
2h 33m
ONT3:47 pmOntario

American Airlines flights from Ontario to Seattle

Our best American Airlines deals on Ontario to Seattle flight tickets
American Airlines
Mar 20
ONT10:10 amOntario
6h 58m
1 stop
SEA5:08 pmSeattle/Tacoma Intl
Mar 26
SEA5:00 amSeattle/Tacoma Intl
6h 54m
1 stop
ONT11:54 amOntario
American Airlines
Jan 19
ONT6:44 amOntario
10h 35m
1 stop
SEA5:19 pmSeattle/Tacoma Intl
Jan 23
SEA6:00 amSeattle/Tacoma Intl
12h 46m
2 stops
ONT6:46 pmOntario
American Airlines
May 16
ONT4:45 pmOntario
7h 14m
1 stop
SEA11:59 pmSeattle/Tacoma Intl
May 25
SEA5:00 amSeattle/Tacoma Intl
16h 44m
1 stop
ONT9:44 pmOntario

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

    The straight-line distance from Ontario to Seattle/Tacoma Intl is 966.6 mi. By plane, this route typically takes 2h 48m.

  • When did momondo last update prices for flights from Ontario Airport to Seattle/Tacoma Intl Airport?

    Prices for flights from Ontario Airport to Seattle/Tacoma Intl Airport are updated daily.

  • How many operators does momondo search for flights from Ontario Airport to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from Ontario Airport to Seattle/Tacoma Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ontario Airport to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.


Alternative routes for Ontario to Seattle

Compare alternative flights to and from nearby airports and cities to discover the best prices and most convenient flight times
Los Angeles to Seattle Flights
Fastest flight time2h 49m
Cheapest price$67
San Francisco to Seattle Flights
Fastest flight time2h 11m
Cheapest price$90
Santa Ana to Seattle Flights
Fastest flight time2h 49m
Cheapest price$68
San Diego to Seattle Flights
Fastest flight time2h 57m
Cheapest price$65
San Jose to Seattle Flights
Fastest flight time2h 15m
Cheapest price$68
Oakland, California to Seattle Flights
Fastest flight time2h 06m
Cheapest price$67
Burbank to Seattle Flights
Fastest flight time2h 40m
Cheapest price$69
Sacramento to Seattle Flights
Fastest flight time1h 58m
Cheapest price$67
Los Angeles to Spokane Flights
Fastest flight time2h 37m
Cheapest price$236
Long Beach to Seattle Flights
Fastest flight time5h 20m
Cheapest price$197
Fresno to Seattle Flights
Fastest flight time2h 16m
Cheapest price$158
San Francisco to Spokane Flights
Fastest flight time2h 09m
Cheapest price$218

Similar Ontario to Seattle flights

Flexible with your destination? Broaden your search and find flights similar to your Ontario to Seattle route

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Seattle?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ontario to Seattle. momondo saves you time and could save you money on your trip.

Can I find flights from Ontario to Seattle with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Seattle from Ontario with this policy.

How can momondo help me find flights from Ontario to Seattle?

momondo helps you find the best flight between Ontario and Seattle 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.

I’m not ready to book a flight from Ontario to Seattle right now. Can momondo alert me if prices change?

Price alerts on flights to Seattle from Ontario 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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