$39 Cheap flights from Seattle - Tacoma Intl. to Los Angeles - Ontario Intl. (SEA to ONT)

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

Amazing SEA to ONT Flight Deals

The cheapest flights to Los Angeles - Ontario Intl. found within the past 7 days were $66 round trip and $39 one way. Prices and availability subject to change. Additional terms may apply.

Sat, May 18 - Tue, Jun 4
SEA
Seattle
ONT
Ontario
$66 Roundtrip, found 2 days ago
$66
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Sat, May 18 from Seattle to Ontario, returning Tue, Jun 4, priced at $66 found 2 days ago
Wed, Aug 7 - Tue, Aug 20
SEA
Seattle
ONT
Ontario
$72 Roundtrip, found 2 days ago
$72
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Wed, Aug 7 from Seattle to Ontario, returning Tue, Aug 20, priced at $72 found 2 days ago
Tue, May 14 - Wed, May 29
SEA
Seattle
ONT
Ontario
$75 Roundtrip, found 2 days ago
$75
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Tue, May 14 from Seattle to Ontario, returning Wed, May 29, priced at $75 found 2 days ago
Thu, May 16 - Tue, Jun 4
SEA
Seattle
ONT
Ontario
$76 Roundtrip, found 2 days ago
$76
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Thu, May 16 from Seattle to Ontario, returning Tue, Jun 4, priced at $76 found 2 days ago
Tue, Aug 20 - Sat, Sep 7
SEA
Seattle
ONT
Ontario
$77 Roundtrip, found 2 days ago
$77
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Tue, Aug 20 from Seattle to Ontario, returning Sat, Sep 7, priced at $77 found 2 days ago
Sat, May 18 - Wed, May 22
SEA
Seattle
ONT
Ontario
$78 Roundtrip, found 9 hours ago
$78
Roundtrip
found 9 hours ago
Select Frontier Airlines flight, departing Sat, May 18 from Seattle to Ontario, returning Wed, May 22, priced at $78 found 9 hours ago
Sat, Aug 3 - Tue, Aug 20
SEA
Seattle
ONT
Ontario
$82 Roundtrip, found 2 days ago
$82
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Sat, Aug 3 from Seattle to Ontario, returning Tue, Aug 20, priced at $82 found 2 days ago
Sat, May 18 - Tue, Jun 4
SEA
Seattle
ONT
Ontario
$83 Roundtrip, just found
$83
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, May 18 from Seattle to Ontario, returning Tue, Jun 4, priced at $83 just found
Mon, Aug 19 - Wed, Sep 4
SEA
Seattle
ONT
Ontario
$87 Roundtrip, found 2 days ago
$87
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Mon, Aug 19 from Seattle to Ontario, returning Wed, Sep 4, priced at $87 found 2 days ago
Wed, Sep 4 - Sat, Sep 21
SEA
Seattle
ONT
Ontario
$88 Roundtrip, found 6 days ago
$88
Roundtrip
found 6 days ago
Select Frontier Airlines flight, departing Wed, Sep 4 from Seattle to Ontario, returning Sat, Sep 21, priced at $88 found 6 days ago

Flight Schedule for SEA to ONT

CarrierFlightDepart SEAArrive ONTFri
4/26		Sat
4/27		Sun
4/28		Mon
4/29		Tue
4/30		Wed
5/1		Thu
5/2		Stops
AS125407:00 am09:33 amCheck Fare
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0 Stops
DL402007:55 am10:40 amCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
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DL401610:30 am01:12 pmCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
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AS109701:13 pm03:46 pmCheck FareCheck Fare
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DL403202:20 pm05:00 pmCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
0 Stops
AS108604:31 pm07:04 pmCheck Fare
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0 Stops
DL403107:59 pm10:40 pmCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
0 Stops
AS104009:26 pm11:59 pmCheck Fare
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0 Stops
AS205507:00 am09:33 am
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0 Stops
AS108806:55 pm09:28 pm
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Check FareCheck Fare
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0 Stops
AS217501:15 pm03:48 pm
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0 Stops
AS345207:00 am09:33 am
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Check FareCheck Fare
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0 Stops

Best Los Angeles - Ontario Intl. Flight and Hotel Packages

Los Angeles - Ontario Intl. flight + hotel packages - economy flights

Prices and availability subject to change. Additional terms may apply.
Dynasty Suites Redlands

Dynasty Suites Redlands

3 out of 5
Save 100% on your flight
per person
Jun 7 - Jun 10
Roundtrip flight included
Seattle (SEA) to Ontario (ONT)
La Quinta Inn & Suites by Wyndham Moreno Valley

La Quinta Inn & Suites by Wyndham Moreno Valley

2.5 out of 5
per person
Jun 7 - Jun 10
Roundtrip flight included
Seattle (SEA) to Ontario (ONT)
Days Inn by Wyndham San Bernardino

Days Inn by Wyndham San Bernardino

2 out of 5
per person
Jun 7 - Jun 10
Roundtrip flight included
Seattle (SEA) to Ontario (ONT)
Hampton Inn & Suites Ontario

Hampton Inn & Suites Ontario

2.5 out of 5
per person
Jun 7 - Jun 10
Roundtrip flight included
Seattle (SEA) to Ontario (ONT)
Azure Hotel & Suites, Trademark Collection by Wyndham

Azure Hotel & Suites, Trademark Collection by Wyndham

3 out of 5
per person
Jun 7 - Jun 10
Roundtrip flight included
Seattle (SEA) to Ontario (ONT)
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Frequently asked questions

Are there direct flights from Sea-Tac Airport to Ontario Airport?
If you’d love to travel from Seattle - Tacoma Intl. Airport (SEA) to Los Angeles - Ontario Intl. Airport (ONT) as quickly as possible, you’ll be happy to know multiple airlines operate direct flights. Choose your favorite seat with Alaska Airlines or Delta.
How long is the flight from SEA to Los Angeles - Ontario Intl. Airport (ONT)?
If you were hoping to get some decent shut-eye during your Seattle to Ontario journey, you may have to make other plans. The average flight time between Seattle - Tacoma Intl. Airport (SEA) and Los Angeles - Ontario Intl. Airport (ONT) is just 2 hours and 35 minutes — just enough to relax your body and close your eyes for a little while.
What is the flight distance from Seattle - Tacoma Intl. Airport (SEA) to Ontario Airport?
Between Sea-Tac Airport and ONT, the flight distance is about 960 mi. So, order a glass of Champagne and settle back. You have some tough decisions to make — watch a movie, dive into your novel or just shut your eyes and sleep?
What airlines fly from Sea-Tac Airport to Los Angeles - Ontario Intl. Airport (ONT)?
If you’re planning a trip to Ontario from Seattle, there are a few airlines offering direct flights. One of the top carriers is Alaska Airlines (AS), which operates 108 flights every month. You’ll want to also check out the deals available through Delta (DL). Another popular airline, it operates 91 flights every month on the Seattle to Ontario route. Be sure to compare the two airlines to find your perfect fare.
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 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that 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 2021, 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 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.

 

Traveling From
Seattle - Tacoma Intl.
Traveling To
Los Angeles - Ontario Intl.
Shortest Flight Time
2 hours 33 mins
Earliest Departure Time
7:00AM PDT
Latest Departure Time
9:26PM PDT
Lowest Flight Price
$66

Route Info

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


Origin:
SEA - Seattle-Tacoma International Airport
Destination:
ONT - LA/Ontario International Airport
Distance:
962.00 miles

Airline carriers and aircraft used on flights from SEA to ONT


Airline Carrier
Aircraft
Alaska Airlines
Canadair Regional Jet
Alaska Airlines
Canadair Regional Jet 700

Discover our best flights from Seattle SEA to Ontario ONT. 

With 20 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 Seattle SEA to Ontario ONT at the right price  

Airfares to Ontario ONT from Seattle SEA currently cost between $66 and $88. 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 Seattle SEA to Ontario ONT 

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 Seattle SEA to Ontario ONT on Travelocity starting at $39. Prices and availability subject to change. Additional terms may apply. 

 

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

Get to Ontario faster, without the hassle of changing planes and moving baggage, by booking a direct flight. Expect your direct flight to ONT from SEA to take around 2 hour(s) 33 min(s).  

 

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

Find cheap flight deals by using our search filters to sort results starting with the lowest price airfares to ONT from SEA. 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 Seattle SEA to Ontario ONT today 

If you’re flexible about when you travel, May is usually the cheapest month to fly from Seattle SEA to Ontario ONT. 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 Ontario ONT from Seattle SEA 

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

 

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