SEA to ONT (Seattle to Ontario) Flights

Last Minute Flights from SEA to ONT

Price found within the past 7 days for the specified period. Click for updated prices.

OriginDestinationTravel DatesFlights From*
SEALos AngelesJune 20 to June 25$244
*Prices include taxes and fees

Cheapest SEA to ONT Flights

Price found within the past 7 days for the specified period. Click for updated prices.

OriginDestinationTravel DatesFlights From*
SEALos AngelesAugust 30 to September 2$149
SEALos AngelesJuly 16 to July 16$171
PAELos AngelesJune 23 to June 27$210
BFILos AngelesAugust 16 to August 19$775
*Prices include taxes and fees
SEA to ONT Flight Details
Origin airport
Seattle - Tacoma Intl.
Origin airport IATA code
SEA
Destination airport
Los Angeles - Ontario Intl.
Destination airport IATA code
ONT
Distance
956 mi

Frequently asked questions

What airlines fly direct from Sea-Tac Airport to Los Angeles - Ontario Intl. Airport (ONT)?
Spend less time squeezed into a plane and more time on your getaway with Delta Air Lines (DL) and Alaska Airlines (AS). Both have nonstop flights from Sea-Tac Airport to Ontario Airport. Delta Air Lines has 121 of these services per month, while Alaska Airlines provides 108.
How many flights are there from SEA to ONT?
There are 7 flights a day from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.), so you have no shortage of ways to get to Ontario. Just find a date and time that matches your plans and lock in your seat.
How long does it take to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
You’ll barely have enough time for a few z’s on this trip of 2 hours and 38 minutes. Seattle, WA (SEA-Seattle - Tacoma Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) is considered a short-haul flight.
What is the flight distance from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
At 960 miles (1,550 1), this medium-haul flight is no endless marathon, but it’s no joyride either. Get to Ontario feeling rested and recharged by having a snooze en route.
How many morning flights are there from SEA to ONT?
There are around 21 morning flights from SEA to ONT every week. Delta Air Lines (DL) has 14 weekly services departing before noon. For early risers, catch the first flight at 7:25AM.
How many afternoon flights are there from SEA to ONT?
Every week, you can choose from 32 afternoon and evening flights from SEA to ONT.

  • Book a ticket with Alaska Airlines (AS). It operates 18 afternoon and evening flights a week taking off from 1:13PM onward.
  • A popular alternative is Delta Air Lines (DL). You can hop on one of its 14 weekly afternoon and evening flights that take off for ONT from 2:20PM.

What is the earliest departure time out of SeaTac to Ontario?
7:00AM is the first flight taking off from SEA, touching down at ONT at 9:33AM. Save time in the morning by having your suitcase zipped up and ready to be tossed into your rideshare.
What is the latest departure time out of SeaTac to Ontario?
Book a seat on the 9:26PM flight from SEA, landing at ONT at 11:59PM, and allow yourself time to attend to any last-minute vacation preparations. This is the latest flight available on this route.
What is the average price from SeaTac to Ontario?
You can find a return airfare from SEA to ONT beginning from around $149. The best fares sell out early, so book as soon as you know your travel dates. This price was available on Flights.com within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Seattle to Ontario Flights

Whether it’s for an obligation or the sake of your sanity, sometimes you need to get away. Maybe you need flights from Seattle to Ontario to attend your cousin’s wedding, to pitch a business idea to your boss, or simply treat yourself to a mini vacation. Regardless of the reasons behind packing your bags and needing to find our cheapest flights from SEA to ONT, we’ve got you covered here at Flights.com.

We present you with some of the most affordable deals on airfare, so stop that Google flights search. We want you to spend less on your flight from Seattle to Ontario, so you can spend more during your getaway. With Flights.com, you’ll find it simple to land airline tickets with itineraries matching your travel schedule. What’s more, we provide you with all the information you need to confidently make reservations on your family, business, or personal trip.