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Amazing United SEA to ONT Flight Deals

The cheapest flights to Los Angeles - Ontario Intl. found within the past 7 days were $166 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


FAQs about United Airlines Flights from SEA to ONT

What terminal is United Airlines at Sea-Tac Airport?

The information printed on tickets can differ between airlines. If you're flying from Seattle, WA Airport (SEA-Seattle - Tacoma Intl.) to Ontario, CA Airport (ONT-Los Angeles - Ontario Intl.) with United Airlines and you can't find your terminal details, get in touch with the airline.

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

Be ready for a stopover when flying from Seattle, WA Airport (SEA-Seattle - Tacoma Intl.) to Ontario, CA Airport (ONT-Los Angeles - Ontario Intl.), as United Airlines doesn't offer any nonstop flights between these two locations. While waiting for your connection, you might like to buy a new novel or a magazine from the airport bookstore to help pass the time.

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

Depending on no delays and good weather, your United Airlines flight from SEA to ONT will take on average 4 hours and 18 minutes. You'll have enough time to enjoy a meal, get some sleep and go over your travel itinerary before touchdown.

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

You can choose from approximately 4 United Airlines flights each day from SEA to ONT.

Flying Tips & Tricks How do I find my flight number?
  • Your flight number will be stated in your itinerary, which your carrier will email to you once your booking has been finalized. It's wise to keep this on hand in case you want to make changes to your booking.
How early can you check bags for a flight?
  • To have plenty of time to drop your luggage, clear security and customs and show up at your boarding gate, get to the airport three hours before an international flight. If you're traveling domestically, show up around two hours before. Even if you've already selected your seat and received your boarding pass online, it's worth keeping in mind that there are closing times for baggage check-in. It's one hour before departure for international flights, and 45 minutes if you're flying domestically. Of course, times can differ between airlines, so check these details ahead of time.

United Flights from SEA to ONT

What airlines fly from SEA (Seattle) to ONT (Los Angeles)?

There are several airlines like that fly from SEA (Seattle) to ONT (Los Angeles) .


How long is the flight from SEA (Seattle) to ONT (Los Angeles)?

️The flight from SEA to ONT is hours minutes non-stop, during that time you will fly about .


How many flights are flown between SEA (Seattle) to ONT (Los Angeles)?

️Approximately flights per day.


How many distance from SEA (Seattle) to ONT (Los Angeles)?

The distance between SEA and ONT airports is about .


What is the earliest and latest flight of the day from SEA (Seattle) to ONT (Los Angeles)??

The earliest flight leaves SEA at and arrives at ONT at The last flight of the day departs SEA at and arrives at ONT at .


*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.