Cheap Delta flights from Seattle to Ontario (SEA to ONT)

Find The Best Day To Fly from Seattle to Ontario

Amazing Delta SEA to ONT Flight Deals

The cheapest flights to Los Angeles - Ontario Intl. found within the past 7 days were $171 round trip and one way. Prices and availability subject to change. Additional terms may apply.

Wed, May 29 - Wed, May 29
SEA
Seattle
ONT
Ontario
$171 Roundtrip, found 2 days ago
$171
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, May 29 from Seattle to Ontario, returning Wed, May 29, priced at $171 found 2 days ago

ONT From SEA Economy Coach Packages on Similar Airlines

Price found within the past 48 hours. Click for updated prices.
Ontario Airport Inn

Ontario Airport Inn

2.5 out of 5
Save 100% on your flight
per person
Jun 14 - Jun 19
Roundtrip flight included
Seattle (SEA) to Ontario (ONT)
Hotel Seville

Hotel Seville

2 out of 5
per person
Jun 14 - Jun 19
Roundtrip flight included
Seattle (SEA) to Ontario (ONT)
Hampton Inn & Suites Ontario

Hampton Inn & Suites Ontario

2.5 out of 5
Save 100% on your flight
per person
Jun 14 - Jun 19
Roundtrip flight included
Seattle (SEA) to Ontario (ONT)
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Frequently asked questions

Can I catch a flight from Sea-Tac Airport to ONT right now?
It’s always wise to learn about any quarantine requirements and travel advice reports in place in your destination city. Ensure you go to the Covid-19 Travel Advisor for up-to-date information on flying to Ontario Airport.
What terminal is Delta Air Lines at Sea-Tac Airport?
While it’s hard to say exactly which terminal your Delta Air Lines flight from Seattle - Tacoma Intl. Airport (SEA) to Ontario Airport will set off from, we can tell you that you’re likely to be exiting the plane at terminal 2.
Are there Delta Air Lines non-stop flights from SEA to ONT?
You bet. Save time and jet straight from Sea-Tac Airport to Ontario Airport with Delta Air Lines. Avoid long layovers, reduce the risk of losing your belongings and reach your destination faster — direct flights are the preferred way to travel for many wise wanderers.
How long is a Delta Air Lines flight from SEA to ONT?
No jet lag, no sore legs — there’s a great deal to love about short flights. If you’re traveling with Delta Air Lines from SEA to ONT, the trip will fly by in about 3 hours and 17 minutes.
What type of aircraft does Delta Air Lines fly from SEA to ONT?
The Embraer 175 is usually used by Delta Air Lines between SEA and ONT. Browse through your in-flight magazine in your seat pocket if you want to find out more information.
How many direct and indirect flights does Delta Air Lines fly from SEA to ONT?
If you’re considering a jaunt from SEA to ONT, you can pick from at least 3 Delta Air Lines flights every day.
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 Airport, please visit our Customer Service Portal.
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.
CarrierFlightDepart SEAArrive ONTWed
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DL388107:25 am10:04 am
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DL394610:54 am01:33 pm
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DL372803:23 pm06:02 pm
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DL386507:55 pm10:38 pm
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Discover our best Delta flight from Seattle SEA to Ontario ONT 

To find the best deals on flights to Seattle from Ontario with Delta, just enter your travel dates, filter by Delta, and hit search. You’ll find 4 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 Delta 

If you’re planning a round trip, booking return flights with Delta is usually the most cost-effective option. With airfares ranging from $171 to $171, it’s easy to find a flight that suits your budget. Prices and availability subject to change. Additional terms may apply. 

 

Book one-way Delta 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 Delta flight from Seattle to Ontario costs from . Prices and availability subject to change. Additional terms may apply. 

 

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

To find a cheap Delta 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 Delta 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 May, or if you book a flight with a stopover. 

 

Find nonstop flights from Seattle SEA to Ontario ONT with Delta 

If you’re keen to be on Ontario soil fast, don’t waste time with a stopover—filter your search results to show direct Delta flights only. The journey takes around 2 hour(s) 39 min(s) – so you’ll be there before you know it. 

 

Flexible airline tickets for Delta 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 Delta 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.

Delta Airports
Hop on a(n) Delta flight today by flying to many destinations out of these domestic and international airports:
Airport code
Country
Airport name
Number of flights
ATLUSAHartsfield-Jackson Atlanta Intl.252
DTWUSADetroit Metropolitan Wayne County156
MSPUSAMinneapolis - St. Paul Intl.131
SLCUSASalt Lake City Intl.116
SEAUSASeattle - Tacoma Intl.57
LAXUSALos Angeles Intl.41
AMSNLDSchiphol31
YYCCANCalgary Intl.26
YYZCANPearson Intl.24
JFKUSAJohn F. Kennedy Intl.23

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
This hotel features a restaurant, a gym, and a bar/lounge. Traveling on business? Take advantage of the 24-hour business center and free WiFi in public areas. ...
8/10 Very Good! (1,385 reviews)
"Love this place. Always clean. Always priced reasonable and always friendly."

Reviewed on Apr 27, 2024

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
This hotel features an outdoor pool, a 24-hour gym, and a restaurant. Traveling on business? Take advantage of the 24-hour business center and free WiFi in public ...
8.4/10 Very Good! (2,260 reviews)
"Beds were horrible. Ontario hotel need new beds, our bed had a huge hole in the center. You just can’t rest in a bed like that one."

Reviewed on Apr 28, 2024

Ontario Airport Hotel & Conference Center
La Quinta Inn & Suites by Wyndham Ontario Airport
La Quinta Inn & Suites by Wyndham Ontario Airport
3 out of 5
3555 Inland Empire Blvd, Ontario, CA
This hotel features an outdoor pool and a gym. Traveling on business? Take advantage of the 24-hour business center, free WiFi in public areas, and free airport ...
8.2/10 Very Good! (1,263 reviews)
"It’s nice, except my room smelled moldy and bathroom sink was kind of clogged. I didn’t put much attention since I was staying over for just one night."

Reviewed on Apr 29, 2024

La Quinta Inn & Suites by Wyndham Ontario Airport
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.