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$39+ 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 2/10. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SEA
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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Cheap flight deals from Ontario to Washington

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Washington (USWA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 21, 2025.

Round-trip from

$94
(Frontier)

One-way from

$39
(Cheapflightsfares)

Good round-trip deal

$175 or less

Good one-way deal

$127 or less
From Ontario to Washington
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One-way flight from Ontario to Washington
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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 January 21, 2025.

This Frontier deal was found by Cheapflights users on 1/20. 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 2/38:01 amONT - PDX
Nonstop2h 26mFrontier
Thu 2/612:03 pmPDX - ONT
1 stop11h 44mFrontier
Deal found 1/20$94
This Cheapflightsfares deal was found by Cheapflights users on 1/21. 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.
Fri 2/2111:25 amONT - SEA
Nonstop2h 51mFrontier
Fri 2/281:36 pmSEA - ONT
Nonstop2h 37mFrontier
Deal found 1/21$106
This Orbitz deal was found by Cheapflights users on 1/21. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/78:01 amONT - PDX
Nonstop2h 26mMultiple Airlines
Sun 2/97:55 pmPDX - ONT
Nonstop2h 18mMultiple Airlines
Deal found 1/21$133
This Travelocity deal was found by Cheapflights users on 1/20. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/86:00 amONT - SEA
Nonstop2h 50mMultiple Airlines
Sun 3/912:52 pmSEA - ONT
Nonstop2h 37mMultiple Airlines
Deal found 1/20$138
This Alaska Airlines deal was found by Cheapflights users on 1/20. 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.
Tue 3/257:00 amONT - PDX
Nonstop2h 24mAlaska Airlines
Tue 4/19:41 pmPDX - ONT
Nonstop2h 18mAlaska Airlines
Deal found 1/20$157
This Delta deal was found by Cheapflights users on 1/20. 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 2/154:05 pmONT - SEA
Nonstop2h 55mDelta
Wed 2/197:45 pmSEA - ONT
Nonstop2h 47mDelta
Deal found 1/20$157
This United Airlines deal was found by Cheapflights users on 1/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/43:30 pmONT - PDX
1 stop5h 20mUnited Airlines
Wed 3/126:00 amPDX - ONT
1 stop3h 54mUnited Airlines
Deal found 1/19$176
This Alaska Airlines deal was found by Cheapflights users on 1/20. 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.
Wed 2/197:00 amONT - SEA
1 stop5h 16mAlaska Airlines
Thu 2/278:49 pmSEA - ONT
Nonstop2h 35mAlaska Airlines
Deal found 1/20$177
This Delta deal was found by Cheapflights users on 1/20. 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.
Tue 1/284:05 pmONT - PDX
1 stop4h 45mDelta
Mon 2/35:20 pmPDX - ONT
1 stop6h 31mDelta
Deal found 1/20$207
This Delta deal was found by Cheapflights users on 1/21. 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.
Tue 2/254:05 pmONT - GEG
1 stop5h 02mDelta
Wed 2/263:25 pmGEG - ONT
1 stop7h 07mDelta
Deal found 1/21$241
This United Airlines deal was found by Cheapflights users on 1/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/43:30 pmONT - PSC
1 stop5h 33mUnited Airlines
Tue 3/111:44 pmPSC - ONT
1 stop4h 20mUnited Airlines
Deal found 1/21$241
This Alaska Airlines deal was found by Cheapflights users on 1/21. 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 4/267:00 amONT - GEG
1 stop4h 37mAlaska Airlines
Mon 4/281:25 pmGEG - ONT
1 stop10h 34mAlaska Airlines
Deal found 1/21$250

Find flights from Ontario to Washington within your budget

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 January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Mon 2/3

8:01 am-10:27 am

Nonstop2h 26m

Portland

Thu 2/6

12:03 pm-11:47 pm

1 stop11h 44m

$94

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Fri 2/21

11:25 am-2:16 pm

Nonstop2h 51m

Seattle/Tacoma Intl

Sun 2/23

12:52 pm-3:29 pm

Nonstop2h 37m

$106

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Fri 2/7

8:01 am-10:27 am

Nonstop2h 26m

Portland

Sun 2/9

7:55 pm-10:13 pm

Nonstop2h 18m

$133

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Sat 3/8

6:00 am-8:50 am

Nonstop2h 50m

Seattle/Tacoma Intl

Sun 3/9

12:52 pm-3:29 pm

Nonstop2h 37m

$138

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Tue 3/25

7:00 am-9:24 am

Nonstop2h 24m

Portland

Tue 4/1

9:41 pm-11:59 pm

Nonstop2h 18m

$157

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Sat 3/1

4:05 pm-7:00 pm

Nonstop2h 55m

Seattle/Tacoma Intl

Sat 3/22

7:40 pm-10:22 pm

Nonstop2h 42m

$157

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Sat 3/1

6:00 am-8:50 am

Nonstop2h 50m

Seattle/Tacoma Intl

Sun 3/2

8:49 pm-11:24 pm

Nonstop2h 35m

$167

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Tue 3/4

3:30 pm-8:50 pm

1 stop5h 20m

Portland

Wed 3/12

6:00 am-9:54 am

1 stop3h 54m

$176

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 2/8

12:48 pm-8:45 pm

1 stop7h 57m

Portland

Mon 2/10

11:36 am-6:24 pm

1 stop6h 48m

$191

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 2/1

4:05 pm-11:58 pm

1 stop7h 53m

Portland

Mon 2/3

5:15 pm-10:32 pm

1 stop5h 17m

$207

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/19

Showing 1-10 of 45 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.

Travel insights for flights from Ontario to Washington

Get recent, data-driven insights about flights from Ontario to Washington including ideal travel times, pricing trends, and more.

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 July is currently the most expensive (average of $411). 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 January 21, 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 January 21, 2025.

The most flights from ONT to USWA are scheduled on a Monday (13 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (8 on average).

Rainfall in Washington by month

Plan your trip to Washington by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in State of Washington ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit State of Washington when rainfall is around 0.7 in.

Temperature in Washington by month

Plan your trip to Washington by taking into account the average temperature totals by month.

If weather is an important factor for your trip to State of Washington, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

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 January 21, 2025.
Get a feel of what it's like to fly with United Airlines, Delta and Frontier from Ontario to Washington by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Food

7.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Boarding

8.2

Reviews

1 / 10

Sheila did great! First time I have ever seen all three people in an exit row get out and read the safety information card AFTER the briefing. I like the boarding process. It seems a shame to UN-differentiate SW because of abuse of the early boarding process.

Southwest
8.1
Very good
4,662 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Food

7.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Boarding

8.2

Reviews

1 / 10

Sheila did great! First time I have ever seen all three people in an exit row get out and read the safety information card AFTER the briefing. I like the boarding process. It seems a shame to UN-differentiate SW because of abuse of the early boarding process.

Alaska Airlines
8.0
Very good
9,706 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Food

7.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Boarding

8.2

Reviews

1 / 10

Sheila did great! First time I have ever seen all three people in an exit row get out and read the safety information card AFTER the briefing. I like the boarding process. It seems a shame to UN-differentiate SW because of abuse of the early boarding process.

Delta
8.0
Very good
8,521 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Food

7.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Boarding

8.2

Reviews

1 / 10

Sheila did great! First time I have ever seen all three people in an exit row get out and read the safety information card AFTER the briefing. I like the boarding process. It seems a shame to UN-differentiate SW because of abuse of the early boarding process.

United Airlines
7.4
Good
8,984 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Food

7.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Boarding

8.2

Reviews

1 / 10

Sheila did great! First time I have ever seen all three people in an exit row get out and read the safety information card AFTER the briefing. I like the boarding process. It seems a shame to UN-differentiate SW because of abuse of the early boarding process.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Food

7.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Boarding

8.2

Reviews

1 / 10

Sheila did great! First time I have ever seen all three people in an exit row get out and read the safety information card AFTER the briefing. I like the boarding process. It seems a shame to UN-differentiate SW because of abuse of the early boarding process.

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 167 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 $39. Users have also found prices from $79 and $94 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: SkyWest Airlines (92%), Delta (92%), Frontier( 90%).

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

    Looking at all options, your cheapest flight can be booked for $69. While the most popular route (Ontario - Seattle/Tacoma Intl) can be booked for $96 on average our data indicates $710 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 July is currently the most expensive (average of $411). 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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Alternative routes for Ontario to Washington

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Top 6 airlines flying from Ontario to Washington

Discover the top 6 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 January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$62Average$140FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$71Average$130FlexibilityNo cancel feeOn-time65%
DeltaCheapest$104Average$315FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$131Average$428FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$218Average$481FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$248Average$406FlexibilityNo cancel feeOn-time63%
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