Flights from Los Angeles - Ontario Intl. (ONT) to Seattle - Tacoma Intl. (SEA) starting at $42

Feel at ease with free flight cancellations within 24 hours of booking

Change your flight without a fee on select flights

Find The Best Dates To Fly from Los Angeles - Ontario Intl. to Seattle - Tacoma Intl.

Amazing ONT to SEA Flight Deals

The cheapest flights to Seattle - Tacoma Intl. found within the past 7 days were $78 round trip and $42 one way. Prices and availability subject to change. Additional terms may apply.

Flight Schedule for ONT to SEA

CarrierFlightDepart ONTArrive SEAFri
9/24
Sat
9/25
Sun
9/26
Mon
9/27
Tue
9/28
Wed
9/29
Thu
9/30
Stops
DL367606:00 am08:43 amCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
0 Stops
AS61706:00 am08:45 amCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
0 Stops
DL365911:05 am01:52 pmCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
0 Stops
AS61511:30 am02:18 pmCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
0 Stops
AS42302:45 pm05:30 pmCheck Fare
-
Check FareCheck Fare
-
-
Check Fare
0 Stops
DL368005:45 pm08:24 pmCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
0 Stops
AS61908:35 pm11:20 pmCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
0 Stops

Best Seattle - Tacoma Intl. Flight and Hotel Packages

Seattle - Tacoma Intl. flight + hotel packages - economy flights

The Oxford Seattle-Downtown by Kasa
The Edgewater - A Noble House Hotel
Kimpton Hotel Vintage Seattle, an IHG Hotel
Hilton Seattle
Hyatt House Seattle/Downtown
Don't see what you're looking for?
See all available trips from Los Angeles - Ontario Intl. to Seattle - Tacoma Intl.
View all trips

FAQs about flights from Los Angeles - Ontario Intl. Airport (ONT) to Seattle - Tacoma Intl. Airport (SEA)

Can I catch a flight from Ontario, CA Airport (ONT-Los Angeles - Ontario Intl.) to Seattle, WA Airport (SEA-Seattle - Tacoma Intl.) right now?

Make sure you visit our Covid-19 Travel Advisor to find out if there are any current travel advice reports or quarantine requirements in effect in Seattle, WA Airport (SEA-Seattle - Tacoma Intl.) when jet-setting from Ontario, CA Airport (ONT-Los Angeles - Ontario Intl.).

Are there direct flights from Los Angeles - Ontario Intl. Airport (ONT) to Seattle, WA Airport (SEA-Seattle - Tacoma Intl.)?

Sometimes, travel is all about the journey; other times, the magic is in the destination. If you're keen to get to where you're going fast, multiple airlines operate direct flights from Ontario Airport to Seattle, WA Airport (SEA-Seattle - Tacoma Intl.), including Alaska Airlines and Delta.

If I am not able to travel due to COVID-19, can I change my booking to a later date?

For more info about changing your flight to Sea-Tac Airport, please visit our Customer Service Portal.

How long is the flight from Ontario, CA Airport (ONT-Los Angeles - Ontario Intl.) to Sea-Tac Airport?

You'll have just enough time to breeze through a few chapters in your favorite novel as the journey from Los Angeles - Ontario Intl. Airport (ONT) to Seattle - Tacoma Intl. Airport (SEA) is only 2 hours and 36 minutes. You might just find yourself left on a cliffhanger!

What is the flight distance from Ontario Airport to Seattle - Tacoma Intl. Airport (SEA)?

You'll have to journey about 963 mi from ONT to Sea-Tac Airport before you can officially begin your exciting vacation. Grab a coffee when the drink cart comes by and watch a couple of your favorite movies. You'll have more than enough time!

What airlines fly from Los Angeles - Ontario Intl. Airport (ONT) to Seattle - Tacoma Intl. Airport (SEA)?

You can choose from a few airlines that fly direct between Los Angeles and Seattle. Alaska Airlines (AS) is one of the most popular. This carrier operates approximately 75 flights each month. If you need more options, look up the deals on offer from Delta (DL). This airline has 121 flights on the Los Angeles to Seattle route each month. Between the two, there's no doubt you'll find the flight to suit your travel needs.

What airlines have practices regarding COVID-19 in place and use social distancing?

From the moment you enter the departure terminal to when you leave the arrivals terminal, if you're flying with Alaska Airlines, Delta or Southwest Airlines you can be sure that COVID-19 measures and social distancing rules have been adhered to. Many airlines have introduced capped capacity flights and keeping the middle seat empty.

What is the best day to buy a plane ticket?

This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2020. Wednesday and Friday prices are also good, but you may want to prepare your budget if booking on a Sunday, as data shows the end of the week is when prices are generally at their highest.

What are the cheapest days to fly?

Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2020, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.

How far in advance can you book a flight?

Trying to figure out how early you should book your flight? It's possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2020 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 2 weeks to 2 months prior to their travel dates.

How can I save money on airline tickets?

We'll let you in on a secret...You can save big on flights if you mix and match your airlines and fare types. In fact, travelers who booked flights on Travelocity in 2020 saved nearly 40% when their return flights consisted of two different airlines or fare types.

*According to flight demand on Travelocity.com from January to December 2020. Savings are subject to change based on departure location, date and destination.

Los Angeles - Ontario Intl. to Seattle - Tacoma Intl. Flight FAQ

Traveling From Los Angeles - Ontario Intl.
Traveling To Seattle - Tacoma Intl.
Shortest Flight Time 2 hours 39 mins
Earliest Departure Time 6:00AM PDT
Latest Departure Time 8:35PM PDT
Lowest Flight Price $78

Route Info

Flight path for flights from LA/Ontario International Airport to Seattle-Tacoma International Airport.

Distance:
1,047.00 miles

Discover our best flights from Ontario ONT to Seattle SEA. 

With 17 airlines to choose from on Travelocity, you can easily find the best option for you. Use our filters to sort by price, compare airlines, and find the most convenient flight times. 

 

Find our best return flights from Ontario ONT to Seattle SEA at the right price  

Airfares to Seattle SEA from Ontario ONT currently cost between $78 and $120. It’s usually cheaper to book a round trip than two separate one-way flights. Prices and availability subject to change. Additional terms may apply. 

 

Book one-way flights from Ontario ONT to Seattle SEA 

If you want to be flexible about when you return, or keep your travel options open ended, a one-way flight could be just the ticket! You’ll find one-way airfares from Ontario ONT to Seattle SEA on Travelocity starting at $42. Prices and availability subject to change. Additional terms may apply. 

 

Get to Seattle SEA from Ontario ONT quicker with direct flights. 

Get to Seattle faster, without the hassle of changing planes and moving baggage, by booking a direct flight. Expect your direct flight to SEA from ONT to take around 2 hour(s) 39 min(s).  

 

Find our cheapest airfares for flights from Ontario ONT to Seattle SEA

Find cheap flight deals by using our search filters to sort results starting with the lowest price airfares to SEA from ONT. Our Price Match Promise means if you find a lower rate on Travelocity.com or on another US-based website within 24 hours of booking, we’ll credit or refund the difference.  

 

Get our best airfare deals for your flight from Ontario ONT to Seattle SEA today 

If you’re flexible about when you travel, October is usually the cheapest month to fly from Ontario ONT to Seattle SEA. If you need to be more specific, search by date and arrival and departure times.Then, compare prices across different airlines, and sort results by lowest price first. 

 

Book flexible airline tickets for flights to Seattle SEA from Ontario ONT 

Some airlines let you change your travel dates without charging a fee. Use our ‘no change fee’ filter to see which flights to SEA from ONT have this option.  

 

Travel with confidence when you book flights to Seattle SEA from Ontario ONT with Travelocity 

We’ve secured fantastic deals with all the main airline carriers and it’s easy to compare, choose, and book with Travelocity. With 24/7 customer service and our free 'App', we’ll always keep you moving. 

*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.