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Cheap Flights from Ontario to Seattle, WA, United States - ONT to SEA

Popular flights from Ontario to Seattle

If your flight days are flexible and you looking for a good deal, our charts on cheap flights provide some insight regarding affordable flight options for your next big adventure.

Alaska Airlines
Departure Date Return Date Lowest Price
Mar 31, 2016 Apr 4, 2016 $187
American Airlines
Departure Date Return Date Lowest Price
Feb 23, 2016 Feb 24, 2016 $186
Mar 8, 2016 Mar 13, 2016 $186
United Airlines
Departure Date Return Date Lowest Price
Feb 24, 2016 Feb 28, 2016 $187

How Much Does it Cost to Fly from Ontario to Seattle (ONT to SEA)?

We have collected flight cost data from across the web for travel from Ontario to Seattle, and have found the average flight price for this trip to be $192.

When Can I Buy the Cheapest Flight from Ontario to Seattle (ONT to SEA)?

Airlines can adjust prices for plane tickets from Ontario to Seattle based on the day and time that you decide to book your flight. We have collected data from all airlines, and have discovered that the best days to book flights are Tuesdays, Wednesdays, and Saturdays. Read our article to find more information about the best time to buy airline tickets.

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

The chart below shows up-to-date information regarding how far in advance a flight from Ontario to Seattle should be booked.

Non Stop versus 1-Stop
Advanced PurchaseNon StopOne Stop
< 7 days $295 $191
7-14 days $187 $186
14-21 days $207 $191
21-30 days $240 $186
30-60 days $187 $193
60-90 days $207 $203
90+ days $212 $220

Cheapest Day To Fly from Ontario to Seattle

The chart below shows up-to-date information regarding the cheapest days to fly from Ontario to Seattle.

Monday Tuesday Wednesday Thursday Friday Saturday Sunday
$201 $186 $187 $187 $191 $191 $207

Lowest Fares Chart By Month from Ontario to Seattle

The chart below shows the lowest fare by month when flying from Ontario to Seattle.

Month Origin Destination Carrier Depart Date Return Date Stops Price
February Ontario Seattle American 2/23/16 2/24/16 1 $186
March Ontario Seattle American 3/8/16 3/13/16 1 $186
April Ontario Seattle Alaska 4/5/16 4/9/16 1 $198
May Ontario Seattle Alaska 5/31/16 6/7/16 0 $212
June Ontario Seattle Alaska 6/1/16 6/8/16 0 $220
July Ontario Seattle American 7/4/16 7/12/16 1 $239
August Ontario Seattle American 8/23/16 8/30/16 0 $246
September Ontario Seattle American 9/3/16 9/10/16 0 $246

Cheapest Weekend Non-Stop Flights for the Next 30 Days from Ontario to Seattle

If you're ready to take a trip in the next 30 days and want to fly on the weekend, you might be wondering which weekend is the cheapest to fly. The chart below shows up-to-date data regarding weekend flight prices from Ontario to Seattle.

Next 30 Days

SunMonTueWedThuFriSat
14 15 16 17 18 19 20
$250
21 22 23 24 25 26 27
$250 $207
28 29 1 2 3 4 5
$207 $266
6 7 8 9 10 11 12
$266 $240
13 14 15 16 17 18 19
$240 $212
20 21 22 23 24 25 26
$212

Non-Stop vs Connecting Flights from Ontario to Seattle (ONT to SEA)

Your Ontario to Seattle flight can be significantly cheaper by choosing a multi-stop airline ticket. Although these connecting flights sacrifice some convenience, on average, travelers save 20%-60% when they choose to fly multi-stop versus a direct flight.

The average price for connecting flights from Ontario to Seattle is $192.

The average price for non-stop flights from Ontario to Seattle is $200.

The chart below shows up to date information regarding non-stop flights from Ontario to Seattle.

Nonstop Flight Details from Ontario to Seattle
CarrierMonTueWedThuFriSatSunEarliest FlightLatest Flight
Alaska 2 2 2 2 2 2 2 10:50 17:25

Round Trip vs One Way Flights from Ontario to Seattle (ONT to SEA)

We have found that there is often no price difference between buying a round trip flight versus a one way flight. Increased flexibility is the main benefit when it comes to buying a one way flight from Ontario to Seattle. However, booking a round trip flight can be a simpler process. You can compare round trip and one way flights by using our flight comparison.

The average price for one way flights from Ontario to Seattle is $95.

The average price for round trip flights from Ontario to Seattle is $189.

More Cheap Flights

FlightsAirlineLowest Price
Los Angeles to Seattle American, Alaska, Spirit, United, Virgin America $86
Las Vegas to Seattle American, Alaska, JetBlue, Spirit, United, Virgin America $78
San Diego to Seattle American, Alaska, Spirit, United, Virgin America $144
Santa Ana to Seattle American, Alaska, United $151
Burbank to Seattle American, Alaska, United $157
Long Beach to Seattle American, JetBlue, United $143
Santa Barbara to Seattle American, Alaska, United $218
Palm Springs to Seattle American, Alaska, United, Virgin America $197
Bakersfield to Seattle American, United $428
San Luis Obispo to Seattle American, United $331
Yuma to Seattle American $305
Palomar to SeattleCheck Dates
Santa Maria to Seattle United $299
Los Angeles to Las Vegas American, Spirit, United, Virgin America $67
Los Angeles to Vancouver American, Air Canada, Alaska, Frontier, Hawaiian, Spirit, Sun Country, United, Virgin America, WestJet $165
Los Angeles to Portland American, Alaska, Spirit, United, Virgin America $78
Los Angeles to New York American, Alaska, JetBlue, Frontier, Spirit, Sun Country, United, Virgin America $239
Los Angeles to Chicago American, Alaska, JetBlue, Frontier, Spirit, United, Virgin America $104
Las Vegas to Vancouver American, Air Canada, Alaska, JetBlue, Frontier, Hawaiian, Spirit, Sun Country, United, Virgin America, WestJet $256
Los Angeles to San Francisco American, Alaska, United, Virgin America $123
Las Vegas to Portland American, Alaska, JetBlue, Spirit, United, Virgin America $78
Los Angeles to Denver American, Alaska, Frontier, Spirit, United, Virgin America $94
Las Vegas to Los Angeles American, Spirit, United, Virgin America $72
Los Angeles to Bellingham American, Alaska, United $213
Los Angeles to Victoria American, Air Canada, Alaska, United, Virgin America, WestJet $236
Los Angeles to Dallas - Ft Worth American, Alaska, Frontier, Spirit, United, Virgin America $81
San Diego to Portland American, Alaska, Frontier, United, Virgin America $181
Las Vegas to Bellingham American, Alaska, United $195
San Diego to Vancouver American, Air Canada, Alaska, Frontier, Hawaiian, Sun Country, United, Virgin America, WestJet $237
Los Angeles to Atlanta American, Alaska, Frontier, Spirit, United $167

Airlines Flying from Ontario to Seattle (ONT to SEA)

Below are the different airlines that fly from Ontario to Seattle with the average price of their plane tickets. Just remember that different airlines offer different levels of comfort and service, so consider convenience when choosing your airline.

Below is the full flight schedule summary of the next 30 days for flights from Ontario to Seattle.

Ontario to Seattle
Airline Connections Mon Tue Wed Thu Fri Sat Sun
American PHX X X X X X X X
Alaska - X X X X X X X
Alaska PDX X X X X X X X
Delta SLC X X X X X X X
United SFO X X X X X X X
Southwest SJC X X X X X X X

Airports for Your Route

These pages contain information about the major airports in Ontario and Seattle, so you can feel comfortable knowing how to get around whether you are about to take off or you just landed.

Ontario to Seattle Flight Questions

Below are some common questions that asked about this flight route:

Question: How long is a direct flight from Ontario to Seattle?
Answer: The average Ontario to Seattle flight time is 2 hours and 40 minutes.
Question: How many miles are there between Ontario and Seattle?
Answer: The distance from Ontario to Seattle is 955 miles.
Question: How common are direct flights from Ontario to Seattle?
Answer: There are 14 direct flights from Ontario to Seattle.
Question: What is the most popular airline for non-stop flights from Ontario to Seattle?
Answer: Alaska Airlines provides 100% of the non-stop flights between Ontario and Seattle.
Question: What are the most popular connecting cities when flying from Ontario to Seattle?
Answer: Phoenix, AZ
Ontario (ONT) To Seattle, WA (SEA) Flights: Cheap Flights From Ontario To Seattle | FareCompare.