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$38+ Cheap flights from Washington to Ontario (ONT)

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 12/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ONT
Nov 12 — Nov 191
Tue 11/12
Tue 11/19
1 adult, Economy
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Find flight deals from Washington to Ontario

Cheapest flights from Washington to Ontario
Explore the most affordable flight options available from Washington to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 7, 2024.

This Frontier deal was found by Cheapflights users on 11/6. 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.
Thu 11/149:22 amPDX - ONT
Nonstop2h 20mFrontier
Sat 11/1610:34 amONT - PDX
Nonstop2h 22mFrontier
Deal found 11/6$83
This Gotogate deal was found by Cheapflights users on 11/6. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/46:41 pmSEA - ONT
Nonstop2h 40mFrontier
Wed 12/1112:34 pmONT - SEA
1 stop20h 23mFrontier
Deal found 11/6$95
This Orbitz deal was found by Cheapflights users on 11/6. 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 12/610:37 amPDX - ONT
Nonstop2h 20mMultiple Airlines
Sun 12/87:00 amONT - PDX
Nonstop2h 25mMultiple Airlines
Deal found 11/6$128
This Alaska Airlines deal was found by Cheapflights users on 11/7. 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 12/710:25 amSEA - ONT
Nonstop2h 33mAlaska Airlines
Tue 12/101:53 pmONT - SEA
Nonstop2h 53mAlaska Airlines
Deal found 11/7$147
This Delta deal was found by Cheapflights users on 11/7. 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 12/75:19 pmPDX - ONT
1 stop5h 42mDelta
Wed 12/116:00 amONT - PDX
1 stop6h 35mDelta
Deal found 11/7$156
This Delta deal was found by Cheapflights users on 11/6. 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.
Thu 12/57:55 pmSEA - ONT
Nonstop2h 50mDelta
Tue 12/105:50 amONT - SEA
Nonstop3h 05mDelta
Deal found 11/6$157
This American Airlines deal was found by Cheapflights users on 11/5. 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.
Fri 12/203:15 pmPSC - ONT
1 stop6h 47mAmerican Airlines
Mon 1/206:10 amONT - PSC
1 stop7h 24mAmerican Airlines
Deal found 11/5$158
This eDestinos deal was found by Cheapflights users on 11/6. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/69:21 pmSEA - ONT
1 stop21h 47mMultiple Airlines
Mon 12/99:23 pmONT - SEA
2 stops26h 47mMultiple Airlines
Deal found 11/6$160
This Alaska Airlines deal was found by Cheapflights users on 11/6. 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 12/108:20 amPDX - ONT
Nonstop2h 16mAlaska Airlines
Fri 12/137:44 pmONT - PDX
Nonstop2h 24mAlaska Airlines
Deal found 11/6$167
This Delta deal was found by Cheapflights users on 11/6. 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 12/113:40 pmGEG - ONT
1 stop7h 02mDelta
Sat 12/145:10 pmONT - GEG
1 stop5h 37mDelta
Deal found 11/6$207
This United Airlines deal was found by Cheapflights users on 11/6. 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.
Wed 12/2511:27 amPDX - ONT
1 stop6h 26mUnited Airlines
Tue 12/316:00 amONT - PDX
1 stop6h 32mUnited Airlines
Deal found 11/6$226
This United Airlines deal was found by Cheapflights users on 11/6. 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.
Wed 12/111:50 pmGEG - ONT
1 stop6h 57mUnited Airlines
Sat 12/145:05 amONT - GEG
1 stop7h 42mUnited Airlines
Deal found 11/6$238

Find flights from Washington to Ontario within your budget

Customize your flight search to find flights from Washington to Ontario 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 2,537,365 searches. Data last updated November 7, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

PortlandOntario

PDX - ONT

PDXONT

Portland

Fri 12/6

10:37 am-12:57 pm

Nonstop2h 20m

$38

SeattleOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

Wed 12/11

5:28 pm-8:00 pm

Nonstop2h 32m

$69

PascoOntario

PSC - ONT

PSCONT

Pasco Tri Cities

Fri 12/13

5:22 pm-12:14 am

1 stop6h 52m

$78

SeattleOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

Sat 12/14

5:15 am-9:53 am

1 stop4h 38m

$88

SeattleOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

Sun 11/24

7:22 pm-10:02 pm

Nonstop2h 40m

$53

PortlandOntario

PDX - ONT

PDXONT

Portland

Tue 1/7

8:13 am-10:34 am

Nonstop2h 21m

$69

PortlandOntario

PDX - ONT

PDXONT

Portland

Sat 12/7

5:19 pm-11:01 pm

1 stop5h 42m

$78

SeattleOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

Wed 11/13

12:55 pm-7:40 pm

2 stops6h 45m

$178

PortlandOntario

PDX - ONT

PDXONT

Portland

Wed 12/25

1:34 pm-5:53 pm

1 stop4h 19m

$113

SeattleOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

Tue 12/3

7:45 am-10:38 am

Nonstop2h 53m

$109

Flights are sorted by cheapest first

Deals found on 11/7

Showing 1-10 of 45 results
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Best time to book a flight from Washington to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Washington 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 Washington to Ontario

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

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

Currently, September is the cheapest month in which you can book a flight from State of Washington to Ontario (average of $236). Flying from State of Washington to Ontario in December is currently the most expensive (average of $298). 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 WA to ONT?

Find hourly flight availability from Washington to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 7, 2024.

When flying from State of Washington to Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from State of Washington to Ontario

Explore weekly flight availability from Washington to Ontario. 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 November 7, 2024.

The most flights from USWA to ONT are scheduled on a Thursday (23 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (2 on average).

Rainfall in Ontario by month

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

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

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

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated November 7, 2024.
To help decide which airline to fly from Washington to Ontario, see what other customers have to say about Frontier, Alaska Airlines and Delta. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
5,083 reviews

Boarding

8.3

Entertainment

7.7

Food

7.2

Overall

8.1

Comfort

8.1

Crew

8.7

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Southwest
8.1
Very good
5,083 reviews
Southwest
8.1
Very good
5,083 reviews

Boarding

8.3

Entertainment

7.7

Food

7.2

Overall

8.1

Comfort

8.1

Crew

8.7

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Alaska Airlines
8.0
Very good
9,428 reviews
Southwest
8.1
Very good
5,083 reviews

Boarding

8.3

Entertainment

7.7

Food

7.2

Overall

8.1

Comfort

8.1

Crew

8.7

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Delta
8.0
Very good
8,828 reviews
Southwest
8.1
Very good
5,083 reviews

Boarding

8.3

Entertainment

7.7

Food

7.2

Overall

8.1

Comfort

8.1

Crew

8.7

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

United Airlines
7.4
Good
9,206 reviews
Southwest
8.1
Very good
5,083 reviews

Boarding

8.3

Entertainment

7.7

Food

7.2

Overall

8.1

Comfort

8.1

Crew

8.7

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
5,083 reviews

Boarding

8.3

Entertainment

7.7

Food

7.2

Overall

8.1

Comfort

8.1

Crew

8.7

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Related info for your journey

Find useful and relevant information for your journey from Washington to Ontario. 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 into for flights to Ontario from Washington?

    Most people fly into Ontario (ONT) if they book a flight to Ontario from Washington. Ontario is conveniently located just 3.1 mi from Ontario’s city center.

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

    Flights from Washington to Ontario have been viewed 71 times in the past calendar month.

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

    One-way options have recently been found by users for as low as $38 on Frontier. Other airlines that offer cheap prices include Alaska Airlines from $69 and Delta from $78 one-way.

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

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

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

    The top 3 most reliable airlines when flying from State of Washington to Ontario are Air France (100%), Aeromexico (100%) and Virgin Atlantic (99%).

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

    The cheapest flight price from State of Washington to Ontario is $47. On average you can expect to pay $398. The most popular route, (Seattle/Tacoma Intl - Ontario), can usually be booked for $67.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Washington to Ontario 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 State of Washington to Ontario?

    Currently, September is the cheapest month in which you can book a flight from State of Washington to Ontario (average of $236). Flying from State of Washington to Ontario in December is currently the most expensive (average of $298). 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.

See more FAQs

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See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from Washington to Ontario

Discover the top 7 airlines that operate flights from Washington to Ontario. 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 2,537,365 searches. Data last updated November 7, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$40Average$127FlexibilityNo cancel feeOn-time65%
FrontierCheapest$54Average$127FlexibilityNo cancel feeOn-time62%
DeltaCheapest$115Average$316FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$121Average$396FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$235Average$428FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$258Average$386FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$349Average$530FlexibilityNo cancel feeOn-time69%
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