/

Ontario / Los Angeles to Seattle

Cheap Flights from Ontario / Los Angeles to Seattle (ONT to SEA)

Save 4% on your first booking

Download our app to DOUBLE the discount!

Flight

Up to 8% Off on App

Valid for first transaction in Traveloka app

BOOKTRAVELOKA

Copy

Hotel

8% off Hotels

Valid for first transaction in Traveloka app

BOOKTRAVELOKA

Copy

Attraction

8% off Attractions

Valid for first transaction in Traveloka app

BOOKTRAVELOKA

Copy

Car Rental

10% off Car Rental

Valid for first transaction in Traveloka app

BOOKTRAVELOKA

Copy

Airport Transfer

12% off Airport Transfer

Valid for first transaction in Traveloka app

BOOKTRAVELOKA

Copy

Flight Information from Ontario / Los Angeles to Seattle

Cheapest one-way flight

SGD 125

Cheapest month to fly

August

Shortest flight duration

2 hr(s), 37 mins

Cheap Flight Ticket Prices and Schedule from Ontario / Los Angeles to Seattle (ONT to SEA) - Today Starting from

Airline

Schedule

Price from

Southwest Airlines

Tuesday, 5 Aug 2025

SGD 125

Book now

Alaska Airlines

Tuesday, 5 Aug 2025

SGD 143

Book now

Delta Airlines

Wednesday, 6 Aug 2025

SGD 148

Book now

United Airlines

Tuesday, 5 Aug 2025

SGD 160

Book now

American Airlines

Friday, 11 Jul 2025

SGD 188

Book now

Alaska Airlines, United Airlines

Monday, 21 Jul 2025

SGD 501

Book now

Hawaiian Airlines, United Airlines

Monday, 21 Jul 2025

SGD 501

Book now

Delta Airlines, United Airlines

Thursday, 10 Jul 2025

SGD 674

Book now

When Is the Cheapest Month & Date to Fly from Ontario / Los Angeles to Seattle?

Jul

From SGD 162

Aug

From SGD 125

Sep

From SGD 132

Oct

Click to find out more

Nov

Click to find out more

Dec

From SGD 173

Jan

Click to find out more

Feb

Click to find out more

Mar

Click to find out more

Apr

Click to find out more

May

Click to find out more

Jun

Click to find out more

Show more results

Flight Schedule from Ontario / Los Angeles to Seattle

The following are all scheduled flights from Ontario / Los Angeles to Seattle, with the shortest duration being 2 hours and 37 minutes.

Thu, 10 Jul 2025

Fri, 11 Jul 2025

Sat, 12 Jul 2025

Airline	Departure Time	Arrival Time	Origin airport	Destination airport
Alaska Airlines	06:00	08:42	Ontario / Los Angeles (ONT)	Seattle (SEA)	Book flight
Delta Airlines	06:25	09:13	Ontario / Los Angeles (ONT)	Seattle (SEA)	Book flight
Delta Airlines	11:25	14:19	Ontario / Los Angeles (ONT)	Seattle (SEA)	Book flight
Alaska Airlines	12:00	14:38	Ontario / Los Angeles (ONT)	Seattle (SEA)	Book flight
Delta Airlines	14:14	17:00	Ontario / Los Angeles (ONT)	Seattle (SEA)	Book flight
Alaska Airlines	14:21	16:58	Ontario / Los Angeles (ONT)	Seattle (SEA)	Book flight
Alaska Airlines	16:00	18:40	Ontario / Los Angeles (ONT)	Seattle (SEA)	Book flight
Delta Airlines	17:59	20:45	Ontario / Los Angeles (ONT)	Seattle (SEA)	Book flight
Alaska Airlines	18:58	21:37	Ontario / Los Angeles (ONT)	Seattle (SEA)	Book flight

Direct flight from Ontario / Los Angeles to Seattle

Non-stop airline flights between Ontario / Los Angeles and Seattle

Airticket booking for direct flights from Ontario / Los Angeles to Seattle is now easier than ever. Travel in just 2 hours and 37 minutes, with fares starting at SGD 125 each way.

Delta Airlines

See Airlines

Southwest Airlines

See Airlines

Top Hotels in Seattle

Grand Hyatt Seattle

Fairmont Olympic Hotel

SureStay Hotel by Best Western SeaTac Airport North

Extended Stay America Premier Suites Seattle Bellevue Downtown

Staypineapple, Watertown Hotel, University District Seattle

Redmond Inn

See all Hotels

Interesting Activities in Seattle

City Sightseeing Seattle Hop-on Hop-off Bus Tour

SGD 30

See all Activities

Why book with Traveloka?

One place for all your needs

From flights, stays, to sights, just count on our complete products and Travel Guides.

Flexible booking options

Sudden change of plan? No worries! Reschedule or Refund without hassle.

Secure & convenient payment

Enjoy many secure ways to pay, in the currency that's most convenient for you.

Frequently Asked Questions

How much is a flight ticket from Ontario / Los Angeles to Seattle?

Planning to take off from Ontario / Los Angeles to Seattle? Grab your ticket on Traveloka with prices starting from , along with additional discounts & promos that can be found on our promo page.

How early should I get to the airport for a domestic & international flight?

For domestic flights, we recommend arriving at the airport at least 2 hours before your scheduled departure time. For international flights, aim to be at the airport at least 3 hours prior to ensure smooth check-in, security checks, and to account for any unexpected delays. It’s better to be early and relaxed than rushing at the last minute right?

When is the best time to buy airline tickets?

Timing is everything when it comes to grabbing airline tickets. Typically, it’s best to book around 4-6 weeks in advance for domestic flights and 2-3 months for international routes. But the prices also depend on the travel demand, seasonality, and major events. You can always monitor the fare trends on Traveloka and set alerts to catch the best deals or promotions!

What is the cheapest day to fly to Seattle?

Looking for the best deals to Seattle? Historically, midweek flights (particularly on Tuesdays and Wednesdays), tend to be cheaper due to lower demand. However, airfares can fluctuate so we recommend keeping an eye on flight prices and being flexible with your travel dates. Booking in advance can be one the hacks to travel to Seattle without breaking the bank!

What information do I need to know when booking a flight?

When booking a flight, every choice sets the tone for your trip. From the preferred flight route – be it direct or with layovers – to the in-flight experience – whether you opt for a standard economy seat or a luxurious first-class journey – and understanding baggage limits, there's a lot to weigh. Other considerations include travel insurance and the airline's booking policies.

How far in advance should I book an international flight?

For international flights, it’s wise to start your search about 5-6 months ahead with the optimal booking window being around 3-4 months before departure. This period often provides a balance between good fares and a reasonable choice of flight times and routes. But please note that several factors such as destination popularity, peak travel season, and regional major events can influence the timeline.

Do I need a passport and visa to fly between Ontario / Los Angeles to Seattle?

Traveling from Ontario / Los Angeles to Seattle typically requires specific documents. For international flights, a passport is almost always necessary. However, for domestic flights, neither a passport nor a visa is usually required, but an official ID will be needed. The necessity of a visa depends on the traveler's citizenship and Seattle's entry regulations. It's crucial to verify visa requirements, as rules can differ between countries.

Why should I book my flight with Traveloka?

Booking flight tickets with Traveloka can feel like diving into an ocean of options! Our platform provides the most comprehensive choices to ensure you find the perfect flight for your adventure. With our smooth booking process, you'll also be provided with a variety of payment methods. Anxious about transacting online? We've got you covered with our top-tier security for each transaction! With Traveloka, your flight booking journey becomes hassle-free!

Is there any available promo in Traveloka?

Yes, you can save 5% off on Flights, Hotels, and Attractions up to S$100 using BOOKTRAVELOKA promo code if you are a new user. The promo is only valid for bookings made through the Traveloka App only.

Cheap Flights from Ontario / Los Angeles to Seattle (ONT to SEA)

Looking for cheap flights from Ontario / Los Angeles to Seattle? Discover the best deals for flight tickets on Traveloka! Flying from Ontario / Los Angeles to Seattle will be more enjoyable with our exclusive Traveloka flight promo. Not just flights, you can also find discounted hotels, airport transfers, and attraction tickets from all over the world. With our complete product offering, booking one-way, round-trip, and multi-city flights will be much easier. Book now and dive into endless adventures with Traveloka!