United Flights from Seattle (SEA) to Ontario (ONT) from $88

Find The Best Day To Fly from Seattle to Ontario

Amazing United SEA to ONT Flight Deals

The cheapest flights to Los Angeles - Ontario Intl. found within the past 7 days were $155 round trip and $88 one way. Prices and availability subject to change. Additional terms may apply.

ONT From SEA Economy Coach Packages on Similar Airlines

Hotel Seville
Ontario Airport Hotel & Conference Center
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FAQs about United Airlines Flights from SEA to ONT

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

It's always wise to know about any travel advice reports and quarantine requirements in effect in your destination. Ensure you check out the Covid-19 Travel Advisor for up-to-date info on booking a flight to Ontario, CA (ONT-Los Angeles - Ontario Intl.).

What terminal is United Airlines at Sea-Tac Airport?

Check your boarding pass to find out which SEA terminal you'll be taking off from on your way to Los Angeles - Ontario Intl. Airport (ONT) with United Airlines. If you can't locate the details on there, contact your airline.

Are there United Airlines non-stop flights from SEA to ONT?

United Airlines doesn't have direct flights between Seattle, WA (SEA-Seattle - Tacoma Intl.) and Ontario Airport, so be prepared to make a stopover. If you're not rushed for time between flights, browse the airport shops while you wait for your connection.

How long is an United Airlines flight from SEA to ONT?

Watch a few TV episodes, listen to a podcast or just put your seat back and relax. You'll need to find a way to amuse yourself during the 8 hours that it takes to journey from SEA to Ontario, CA (ONT-Los Angeles - Ontario Intl.) with United Airlines.

How many direct and indirect flights does United Airlines fly from SEA to ONT?

No fewer than 7 United Airlines flights operate between SEA and ONT each week.

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 Ontario, CA (ONT-Los Angeles - Ontario Intl.), please visit our Customer Service Portal.

Which airlines offer COVID-19 measures and exercise social distancing rules?

Southwest Airlines, American Airlines and Delta are just some of the many carriers that employ COVID-19 measures and use social distancing rules on their flights. Some of their strategies are cleaning with disinfectant and providing passenger masks.

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.

Discover our best United flight from Seattle SEA to Ontario ONT 

To find the best deals on flights to Seattle from Ontario with United, just enter your travel dates, filter by United, and hit search. You’ll find flights to choose from and can sort by price, flight duration, and arrival or departure time.  

 

Return flights from Seattle SEA to Ontario ONT with United 

If you’re planning a round trip, booking return flights with United is usually the most cost-effective option. With airfares ranging from $155 to $155, it’s easy to find a flight that suits your budget. Prices and availability subject to change. Additional terms may apply. 

 

Book one-way United flights from Seattle SEA to Ontario ONT 

A one-way ticket gives you much greater flexibility—allowing you to choose your return date, destination, and time whenever you’re ready. By booking in advance you can find great deals on one-way tickets too. Right now, a one-way United flight from Seattle to Ontario costs from $88. Prices and availability subject to change. Additional terms may apply. 

 

The easy way to find cheap flights to Ontario ONT from  Seattle SEA with United 

To find a cheap United flight from Seattle SEA to Ontario ONT, sort your search results by price or filter by budget. Thanks to Travelocity’s Price Match Promise, if you find a better airfare deal anywhere else within 24 hours, we’ll credit or refund the difference. 

 

How to find our best airfare deals on United flights from Seattle SEA to Ontario ONT 

If you’re looking for cheap flights, it helps to be flexible when it comes to your travel dates. You’ll usually find lower cost tickets when you travel during quieter months such as October, or if you book a flight with a stopover. 

 

Find nonstop flights from Seattle SEA to Ontario ONT with United 

If you’re keen to be on Ontario soil fast, don’t waste time with a stopover—filter your search results to show direct United flights only. The journey takes around hour(s) min(s) – so you’ll be there before you know it. 

 

Flexible airline tickets for United flights from Seattle SEA to Ontario ONT 

Make sure you’re not out of pocket if plans change by choosing a flexible ticket with penalty-free amendment and cancellation options. Use our ‘no change fee’ filter to see which flights have this option.  

 

There are a lot of reasons to book your flights to Ontario ONT from  Seattle SEA with United on Travelocity 

At Travelocity our vast and up-to-the-minute inventory puts all of our best flight deals in one place. So, whether you’re traveling on business or jetting off with friends and family, you can trust Travelocity to get you there.

United Airports
Hop on a(n) United flight today by flying to many destinations out of these domestic and international airports:
Airport Code
Country
Airport Name
Number of Flights
ORDUSAO'Hare Intl.227
DENUSADenver Intl.226
IAHUSAGeorge Bush Intercontinental136
IADUSAWashington Dulles Intl.100
SFOUSASan Francisco Intl.64
LAXUSALos Angeles Intl.23
EWRUSALiberty Intl.20
FRADEUFrankfurt Intl.19
NRTJPNNarita Intl.19
PEKCHNCapital Intl.16

Travelers ❤️ these 🏨 after their flight to Ontario

Azure Hotel & Suites, Trademark Collection by Wyndham
Azure Hotel & Suites, Trademark Collection by Wyndham
3 out of 5
1945 E. Holt Blvd, Ontario, CA
The price is $108 per night from Sep 27 to Sep 27
This hotel features a restaurant, a fitness center, and a bar/lounge. Traveling on business? Take advantage of the 6 conference rooms, as well as the 24-hour ...
4.4/5Excellent! (51 reviews)
"It was OK but it’s old and it needs renovation And for the price that I paid it was not worth it I could’ve went to a super eight motel and it would’ve been better"

Reviewed on Sep 8, 2021

Azure Hotel & Suites, Trademark Collection by Wyndham
Ontario Airport Hotel & Conference Center
Ontario Airport Hotel & Conference Center
3.5 out of 5
700 N Haven Ave, Ontario, CA
The price is $119 per night from Sep 22 to Sep 22
This hotel features an outdoor pool, a 24-hour fitness center, and a restaurant. Traveling on business? Take advantage of the 16 conference rooms, as well as ...
3.8/5Good! (17 reviews)
"Nice stay"

Reviewed on Jun 16, 2021

Ontario Airport Hotel & Conference Center
Holiday Inn Ontario Airport, an IHG Hotel
Holiday Inn Ontario Airport, an IHG Hotel
3 out of 5
2155 E. Convention Center Way, Ontario, CA
The price is $110 per night from Oct 3 to Oct 3
This hotel features a restaurant, a spa tub, and a bar/lounge. Traveling on business? Take advantage of the 3 conference rooms, as well as the 24-hour business ...
3.9/5Very Good! (23 reviews)
"all was ok"

Reviewed on Apr 6, 2021

Holiday Inn Ontario Airport, an IHG Hotel
Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.
*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.