How do most travelers feel about Alaska Airlines?

Alaska Airlines has received a 6.2/10 rating from 4,006 Cheapflights user reviews. If you wish to plan your next trip from Ontario to Seattle with Alaska Airlines, enter your preferred travel dates above!

Can I get a flight from Ontario to Seattle on Alaska Airlines for under $300?

There are 12 flights available on Alaska Airlines from Ontario to Seattle for under $300. These prices can change based on many factors including date and time. To find ONT-SEA flight prices for your dates, click here.

How far ahead should I book a flight from Ontario to Seattle with Alaska Airlines?

Booking with Alaska Airlines 77 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ontario to Seattle. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Ontario to Seattle with Alaska Airlines?

Currently, the most affordable month to book a Alaska Airlines flight from Ontario to Seattle in January, with an average price of $247. Conversely, traveling with Alaska Airlines from Ontario to Seattle in July will be the most expensive, with an average cost of $406. Various factors influence flight prices, so comparing airlines, departure airports, and times can help reduce costs.

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Fly Alaska Airlines from ONT to SEA as low as $99

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Cheapflights users flying from Ontario to Seattle on Alaska Airlines typically fly into Seattle/Tacoma Intl and depart from Ontario. Select your dates above for pricing.

Alaska Airlines flights from Ontario to Seattle in 2024

Popular in	December
Cheapest in	October
Average price (all airlines)	$218
One-way from	$99
Round-trip from	$151

Highest demand for flights from Ontario to Seattle/Tacoma Intl; 4% potential price increase.

Search Deals

Best time to find cheap flights from Ontario to Seattle/Tacoma Intl; 1% potential price drop.

Search Deals

Average price for all Ontario to Seattle/Tacoma Intl flights (one-way and round-trip).

Search Deals

Cheapest one-way Alaska Airlines flight from Ontario to Seattle/Tacoma Intl

Search Deals

Cheapest round-trip Alaska Airlines flight from Ontario to Seattle/Tacoma Intl

Search Deals

Can I get a flight from Ontario to Seattle on Alaska Airlines for under $300?
There are 12 flights available on Alaska Airlines from Ontario to Seattle for under $300. These prices can change based on many factors including date and time. To find ONT-SEA flight prices for your dates, click here.
How do most travelers feel about Alaska Airlines?
Alaska Airlines has received a 6.2/10 rating from 4,006 Cheapflights user reviews. If you wish to plan your next trip from Ontario to Seattle with Alaska Airlines, enter your preferred travel dates above!

Cheapest Alaska Airlines flights from Ontario to Seattle

Sun 6/306:00 amONT - SEA

Nonstop2h 40mAlaska Airlines

Wed 7/109:26 pmSEA - ONT

Nonstop2h 33mAlaska Airlines

Deal found 5/31$187

Pick Dates

Sat 6/226:00 amONT - SEA

Nonstop2h 36mAlaska Airlines

Sat 6/229:26 pmSEA - ONT

Nonstop2h 33mAlaska Airlines

Deal found 5/31$197

Pick Dates

Mon 6/2410:00 amONT - SEA

Nonstop2h 37mAlaska Airlines

Wed 6/264:29 pmSEA - ONT

1 stop6h 11mAlaska Airlines

Deal found 6/1$226

Pick Dates

Direct flights from Ontario to Seattle on Alaska Airlines

Wed 8/144:24 pmONT - SEA

Nonstop2h 35mAlaska Airlines

Wed 8/149:26 pmSEA - ONT

Nonstop2h 33mAlaska Airlines

Deal found 6/2$151

Pick Dates

Tue 7/98:20 pmONT - SEA

Nonstop2h 35mAlaska Airlines

Mon 7/159:26 pmSEA - ONT

Nonstop2h 33mAlaska Airlines

Deal found 6/1$177

Pick Dates

Wed 7/104:24 pmONT - SEA

Nonstop2h 35mAlaska Airlines

Sun 7/146:30 amSEA - ONT

Nonstop2h 35mAlaska Airlines

Deal found 6/1$187

Pick Dates

Last minute deals on Cheapflights

Wed 6/126:00 amONT - SEA

Nonstop2h 45mAlaska Airlines

Sun 6/166:30 amSEA - ONT

Nonstop2h 35mAlaska Airlines

Deal found 6/2$332

Pick Dates

Sat 6/87:10 amONT - SEA

1 stop4h 24mAlaska Airlines

Sat 6/155:20 pmSEA - ONT

1 stop5h 20mAlaska Airlines

Deal found 6/1$351

Pick Dates

Sat 6/810:00 amONT - SEA

Nonstop2h 45mAlaska Airlines

Sat 6/84:42 pmSEA - ONT

Nonstop2h 32mAlaska Airlines

Deal found 6/1$361

Pick Dates

One-way Alaska Airlines flights to Seattle from Ontario

Thu 7/48:20 pmONT - SEA

Nonstop2h 35mAlaska Airlines

Deal found 6/2$99

Pick Dates

Fri 7/57:00 amONT - SEA

1 stop5h 32mAlaska Airlines

Deal found 6/2$108

Pick Dates

Sun 7/146:00 amONT - SEA

Nonstop2h 40mAlaska Airlines

Deal found 6/2$109

Pick Dates

Best time to book a flight from Ontario to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Ontario with our price prediction graph.

Estimated round-trip price

Temperature and rainfall in Seattle by month

SEA Temperature	41 - 66.2 °F

SEA

Temperature

41 - 66.2 °F

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

Browse thousands of different options on Cheapflights for your next trip

Fly from Ontario to Seattle on another airline
Consider alternative airlines that service the Seattle area. Flight routes are based on user searches made on Cheapflights and were last updated on June 2, 2024.

Frontier flights from Ontario to Seattle/Tacoma Intl

Delta flights from Ontario to Seattle/Tacoma Intl

Complete your trip
Complete your trip to Seattle by adding a car rental and/or hotel reservation to your travel itinerary.

Seattle car rentals

Seattle/Tacoma Intl Airport car rentals

Kenmore Air Harbor Airport car rentals

Spokane car rentals

Bellingham car rentals

Pasco car rentals

Yakima car rentals

Walla Walla car rentals

Wenatchee car rentals

Pullman car rentals

Capitol Hill car rentals

West Seattle car rentals

Other popular destinations in North America
If Seattle is not for you, choose from these other destinations located in North America. Flight routes are based on user searches made on Cheapflights and were last updated on June 2, 2024.

Flights to New York

Flights to Los Angeles

Flights to San Francisco

Flights to Fort Lauderdale

Popular flights with Alaska Airlines
Browse through some of the most popular routes that Alaska Airlines offers at this time. Flights are based on user searches made on Cheapflights and were last updated on June 2, 2024.

Alaska Airlines flights from Ontario to Seattle

See what others are saying about Alaska Airlines

Alaska Airlines

8.0

Very good

9,198 reviews

Check prices

Overview

Recent reviews

10.0

Wonderful|Apr 2022

Enjoyable ride.

5.9

Fair|Oct 2021

Lost luggage

2.0

Poor|Sep 2022

Nothing

4.0

Mediocre|Apr 2022

It's no surprise that Alaska Airlines is having problems with flight cancellations and delays right now. (Though, I didn't know that when I booked the tickets.) However, the late notice for changes is infuriating. While I was riding into the airport, I got the notice that my flight was delayed by an hour. Half an hour after the delayed boarding was set to begin, we were told the plane would land in 7 minutes. The plane actually arrived about 30 minutes later. I don't get how you miss by that much, as 7 minutes out means the plane is already on final approach. We finally got on the plane, and were told there was a small maintenance issue being taken care of, and we'd be off in like 5 minutes. 15 minutes later, we were still sitting there with no updates. In the grand scheme of things, they got me home just a couple of hours late. The lack of communication just left a bad taste in my mouth.

8.0

Very good|Apr 2022

It’s okay

1 out of 3066

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

View all available airlines

Cheapflights users flying from Ontario to Seattle on Alaska Airlines typically fly into Seattle/Tacoma Intl and depart from Ontario. Select your dates above for pricing.

Alaska Airlines flights from Ontario to Seattle in 2024

Find detailed information about Alaska Airlines flights from Ontario to Seattle. Explore the options provided by Alaska Airlines to plan your journey from Ontario to Seattle. Data last updated June 2, 2024.

Popular in

Cheapest in

Average price (all airlines)

One-way from

Round-trip from

Can I get a flight from Ontario to Seattle on Alaska Airlines for under $300?

How do most travelers feel about Alaska Airlines?

Cheapest Alaska Airlines flights from Ontario to Seattle

Direct flights from Ontario to Seattle on Alaska Airlines

Last minute deals on Cheapflights

One-way Alaska Airlines flights to Seattle from Ontario

Best time to book a flight from Ontario to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Ontario with our price prediction graph.

Temperature and rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average temperature and rainfall totals by month.

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Fly from Ontario to Seattle on another airline
Consider alternative airlines that service the Seattle area. Flight routes are based on user searches made on Cheapflights and were last updated on June 2, 2024.

Consider alternative airlines that service the Seattle area. Flight routes are based on user searches made on Cheapflights and were last updated on June 2, 2024.

Other Alaska Airlines flights from Ontario
Browse through other Alaska Airlines flights departing from Ontario. Flight routes are based on user searches made on Cheapflights and were last updated on June 2, 2024.

Browse through other Alaska Airlines flights departing from Ontario. Flight routes are based on user searches made on Cheapflights and were last updated on June 2, 2024.

Complete your trip
Complete your trip to Seattle by adding a car rental and/or hotel reservation to your travel itinerary.

Complete your trip to Seattle by adding a car rental and/or hotel reservation to your travel itinerary.

Other airlines servicing Ontario and Seattle
Choose from other airlines serving Ontario and Seattle.

Choose from other airlines serving Ontario and Seattle.

Other popular destinations in North America
If Seattle is not for you, choose from these other destinations located in North America. Flight routes are based on user searches made on Cheapflights and were last updated on June 2, 2024.

If Seattle is not for you, choose from these other destinations located in North America. Flight routes are based on user searches made on Cheapflights and were last updated on June 2, 2024.

Popular flights with Alaska Airlines
Browse through some of the most popular routes that Alaska Airlines offers at this time. Flights are based on user searches made on Cheapflights and were last updated on June 2, 2024.

Browse through some of the most popular routes that Alaska Airlines offers at this time. Flights are based on user searches made on Cheapflights and were last updated on June 2, 2024.

See what others are saying about Alaska Airlines

Overview

Recent reviews

100% Free

Book with Flexibility

Travel Smart

Flights

Alaska Airlines flights from Ontario to Seattle (ONT - SEA)

Cheapflights users flying from Ontario to Seattle on Alaska Airlines typically fly into Seattle/Tacoma Intl and depart from Ontario. Select your dates above for pricing.

Alaska Airlines flights from Ontario to Seattle in 2024

Find detailed information about Alaska Airlines flights from Ontario to Seattle. Explore the options provided by Alaska Airlines to plan your journey from Ontario to Seattle. Data last updated June 2, 2024.

Popular in

Cheapest in

Average price (all airlines)

One-way from

Round-trip from

Can I get a flight from Ontario to Seattle on Alaska Airlines for under $300?

How do most travelers feel about Alaska Airlines?

Cheapest Alaska Airlines flights from Ontario to Seattle

Direct flights from Ontario to Seattle on Alaska Airlines

Last minute deals on Cheapflights

One-way Alaska Airlines flights to Seattle from Ontario

Best time to book a flight from Ontario to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Ontario with our price prediction graph.

Temperature and rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average temperature and rainfall totals by month.

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Fly from Ontario to Seattle on another airlineConsider alternative airlines that service the Seattle area. Flight routes are based on user searches made on Cheapflights and were last updated on June 2, 2024.

Consider alternative airlines that service the Seattle area. Flight routes are based on user searches made on Cheapflights and were last updated on June 2, 2024.

See what others are saying about Alaska Airlines

Overview

100% Free

Book with Flexibility

Travel Smart

Fly from Ontario to Seattle on another airline
Consider alternative airlines that service the Seattle area. Flight routes are based on user searches made on Cheapflights and were last updated on June 2, 2024.