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$62+ Cheap flights from Ontario (ONT) to Washington

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SEA
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
1 adult, Economy
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Cheap flight deals from Ontario to Washington

Keep the following information in mind while searching for Ontario to Washington flight deals. Data was last updated July 29, 2025.

Round-trip from

$110
(Cheapflightsfares)

One-way from

$62
(Frontier)

Popular in

July

Cheapest in

January

Average price

$266

Good round-trip deal

$191 or less

Good one-way deal

$120 or less
From Ontario to Washington
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One-way flight from Ontario to Washington
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Highest demand for flights based on searches. 17% potential increase in price ($43 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Ontario to Washington.
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Price to beat on a one-way flight from Ontario to Washington.
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Find flight deals from Ontario to Washington

Cheapest flights from Ontario to Washington
Explore the most affordable flight options available from Ontario to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/258:25 amONT - PDX
Nonstop2h 24mFrontier
Fri 8/297:04 pmPDX - ONT
Nonstop2h 23mFrontier
Deal found 7/29$110
This Cheapflightsfares deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1110:03 amONT - SEA
Nonstop2h 50mFrontier
Thu 8/141:42 pmSEA - ONT
Nonstop2h 54mFrontier
Deal found 7/28$144
This Alaska Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1111:15 amONT - PDX
Nonstop2h 19mAlaska Airlines
Wed 10/159:30 pmPDX - ONT
Nonstop2h 21mAlaska Airlines
Deal found 7/29$157
This American Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/41:10 pmONT - PDX
1 stop6h 13mAmerican Airlines
Sat 10/185:05 amPDX - ONT
1 stop6h 56mAmerican Airlines
Deal found 7/29$159
This Hawaiian Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/236:00 amONT - SEA
Nonstop2h 45mHawaiian Airlines
Tue 8/265:20 amSEA - ONT
1 stop4h 06mHawaiian Airlines
Deal found 7/29$167
This Delta deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/611:40 amONT - SEA
Nonstop2h 45mDelta
Sat 9/138:15 amSEA - ONT
Nonstop2h 54mDelta
Deal found 7/28$177
This Trip.com deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/76:00 amONT - BLI
1 stop17h 17mMultiple Airlines
Mon 8/119:00 pmBLI - ONT
1 stop24h 52mMultiple Airlines
Deal found 7/27$180
This Frontier deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/412:59 amONT - GEG
1 stop10h 07mFrontier
Tue 8/1211:51 amGEG - ONT
1 stop11h 59mFrontier
Deal found 7/29$198
This Delta deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2711:40 amONT - PSC
1 stop4h 55mDelta
Sun 8/316:20 amPSC - ONT
1 stop4h 30mDelta
Deal found 7/28$219
This American Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2810:09 amONT - GEG
1 stop6h 14mAmerican Airlines
Fri 10/316:34 amGEG - ONT
1 stop5h 27mAmerican Airlines
Deal found 7/27$229
This Alaska Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/67:10 amONT - GEG
1 stop4h 34mAlaska Airlines
Wed 9/108:51 pmGEG - ONT
1 stop13h 53mAlaska Airlines
Deal found 7/28$236
This Hawaiian Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/273:04 pmONT - PSC
1 stop6h 11mHawaiian Airlines
Sun 8/316:00 amPSC - ONT
1 stop4h 44mHawaiian Airlines
Deal found 7/27$238

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Washington that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 29, 2025.
Use the filters below to find and compare flights from Ontario to Washington that are best for you.

Fly from

Ontario

Fly to

Washington

Route

Depart

Return

Price

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Mon 8/25

8:25 am-10:49 am

Nonstop2h 24m

Portland

Fri 8/29

7:04 pm-9:27 pm

Nonstop2h 23m

$110

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Fri 8/15

10:03 am-12:53 pm

Nonstop2h 50m

Seattle/Tacoma Intl

Fri 8/22

1:20 pm-4:14 pm

Nonstop2h 54m

$141

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 10/11

11:15 am-1:34 pm

Nonstop2h 19m

Portland

Tue 10/14

2:38 pm-4:53 pm

Nonstop2h 15m

$157

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Wed 8/27

11:39 am-2:19 pm

Nonstop2h 40m

Seattle/Tacoma Intl

Wed 9/3

7:55 am-10:44 am

Nonstop2h 49m

$157

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Sat 9/27

6:00 am-8:45 am

Nonstop2h 45m

Seattle/Tacoma Intl

Tue 9/30

5:20 am-9:26 am

1 stop4h 06m

$167

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Fri 9/5

11:40 am-2:25 pm

Nonstop2h 45m

Seattle/Tacoma Intl

Tue 9/9

8:05 am-10:50 am

Nonstop2h 45m

$187

OntarioSpokane

ONT - GEG

ONTGEG

Ontario

Mon 8/11

12:59 am-11:06 am

1 stop10h 07m

Spokane

Thu 8/21

11:52 am-11:50 pm

1 stop11h 58m

$208

OntarioPasco

ONT - PSC

ONTPSC

Ontario

Wed 8/27

11:40 am-4:35 pm

1 stop4h 55m

Pasco Tri Cities

Sun 8/31

6:20 am-10:50 am

1 stop4h 30m

$219

OntarioSpokane

ONT - GEG

ONTGEG

Ontario

Tue 10/28

10:09 am-4:23 pm

1 stop6h 14m

Spokane

Fri 10/31

6:34 am-12:01 pm

1 stop5h 27m

$229

OntarioSpokane

ONT - GEG

ONTGEG

Ontario

Sat 9/6

7:10 am-11:44 am

1 stop4h 34m

Spokane

Wed 9/10

8:51 pm-10:44 am

1 stop13h 53m

$236

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 56 results
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Best time to book a flight from Ontario to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Washington

What is the cheapest month to book a flight from Ontario to State of Washington?

Currently, January is the cheapest month in which you can book a flight from Ontario to State of Washington (average of $238). Flying from Ontario to State of Washington in June is currently the most expensive (average of $389). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to WA?

Find hourly flight availability from Ontario to Washington. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 29, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to State of Washington as you normally would.

Weekly flight availability from Ontario to State of Washington

Explore weekly flight availability from Ontario to Washington. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 29, 2025.

The most flights from ONT to USWA are scheduled on a Monday (26 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (15 on average).

Reviews of airlines servicing Washington

Get insights into the airlines that provide service to Washington. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Washington. Reviews last updated July 29, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest, and Delta from Ontario to Washington by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Southwest
8.0
Very good
4,238 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Delta
8.0
Very good
7,977 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Hawaiian Airlines
7.8
Good
2,605 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
United Airlines
7.4
Good
8,899 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Washington. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Washington?

    Located just 3.1 mi from the city center, Ontario (ONT) is the airport most travelers will use when flying to Washington from Ontario.

  • How popular is this Ontario to State of Washington flight route?

    This flight path from Ontario to Washington was viewed by 203 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • What are the cheapest airlines to fly from Ontario to State of Washington one-way?

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $62. Users have also found prices from $88 and $104 on Alaska Airlines and Southwest, respectively.

  • What are the most popular routes from Ontario to State of Washington?

    While some choose either Ontario - Portland or Ontario - Spokane, Ontario - Seattle/Tacoma Intl is the most popular route from Ontario to State of Washington.

  • What are the most reliable airlines from Ontario to State of Washington?

    Before booking your flight to State of Washington from Ontario, check out the most reliable airlines to get you to your destination on time: Scandinavian Airlines (95%), Virgin Atlantic (94%), KLM( 94%).

  • What are the cheapest flights from Ontario to State of Washington?

    Looking at all options, your cheapest flight can be booked for $86. While the most popular route (Ontario - Seattle/Tacoma Intl) can be booked for $96 on average our data indicates $1,655 when flying from Ontario to State of Washington.

  • Can I find deals for flights from Ontario to Washington that include hotel bookings?

    Yes. In addition to deals on Ontario to Washington flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Washington?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Washington.

  • Can I find deals for business class flights from Ontario to Washington?

    Yes. Cheapflights offers flight deals from Ontario to Washington by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to State of Washington?

    Currently, January is the cheapest month in which you can book a flight from Ontario to State of Washington (average of $238). Flying from Ontario to State of Washington in June is currently the most expensive (average of $389). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Top 7 airlines flying from Ontario to Washington

Discover the top 7 airlines that operate flights from Ontario to Washington. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$71Average$101FlexibilityNo cancel feeOn-time65%
FrontierCheapest$72Average$164FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$98Average$319FlexibilityNo cancel feeOn-time85%
DeltaCheapest$116Average$262FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$137Average$382FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$150Average$325FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$218Average$477FlexibilityNo cancel feeOn-time69%

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