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 $69 and $89 on Alaska Airlines and United Airlines, respectively.

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.

Weekly flight availability from Ontario to State of Washington

The most flights from ONT to USWA are scheduled on a Sunday (17 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (9 on average).

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.

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).

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 cheapest flights from Ontario to State of Washington?

Looking at all options, your cheapest flight can be booked for $56. While the most popular route (Ontario - Seattle/Tacoma Intl) can be booked for $78 on average our data indicates $988 when flying 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: KLM (95%), LATAM Airlines (95%), ITA Airways( 95%).

What are the most popular airlines that fly from Ontario to State of Washington?

Alaska Airlines, Delta and Frontier are the most popular airlines when flying from Ontario to State of Washington.

How far in advance should I book a flight from Ontario to State of Washington?

To save up to 104% on this flight, we recommend booking at least 30 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Ontario to State of Washington from $276 1-2 weeks out and tickets from $443 for flights departing within the next 72 hours.

What is the cheapest month to fly from Ontario to State of Washington?

Flights from Ontario to State of Washington lean towards being more expensive in March. Prices are generally better when you fly from Ontario to State of Washington in January, with the cheapest ticket starting at $40.

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

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.

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.

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.

$39+ Flights from Ontario to Washington

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2. Select your favorite providers

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Cheap flight deals from Ontario to Washington

Round-trip from	$102 (FlightHub)
One-way from	$39 (Cheapflightsfares)

From Ontario to Washington

Search Deals

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 13, 2025.

Fri 1/248:01 amONT - PDX

Nonstop2h 26mFrontier

Mon 1/2710:35 amPDX - ONT

Nonstop2h 21mFrontier

Deal found 1/13

$96

Fri 2/2111:25 amONT - SEA

Nonstop2h 51mFrontier

Mon 2/241:36 pmSEA - ONT

Nonstop2h 37mFrontier

Deal found 1/12

$106

Wed 5/1411:46 amONT - SEA

Nonstop2h 45mMultiple Airlines

Thu 5/229:39 amSEA - ONT

Nonstop2h 40mMultiple Airlines

Deal found 1/12

$113

Sat 2/85:44 pmONT - PDX

Nonstop2h 26mMultiple Airlines

Mon 2/1010:35 amPDX - ONT

Nonstop2h 21mMultiple Airlines

Deal found 1/13

$123

Tue 2/44:06 pmONT - SEA

Nonstop2h 53mAlaska Airlines

Wed 2/58:00 amSEA - ONT

Nonstop2h 38mAlaska Airlines

Deal found 1/13

$137

Tue 2/46:00 amONT - SEA

Nonstop2h 55mDelta

Thu 2/612:40 pmSEA - ONT

Nonstop2h 45mDelta

Deal found 1/13

$147

Sat 2/85:44 pmONT - PDX

Nonstop2h 26mAlaska Airlines

Wed 2/128:13 amPDX - ONT

Nonstop2h 21mAlaska Airlines

Deal found 1/12

$157

Tue 1/2812:48 pmONT - PDX

1 stop7h 57mAmerican Airlines

Thu 2/68:24 amPDX - ONT

1 stop7h 05mAmerican Airlines

Deal found 1/12

$189

Sun 4/207:05 amONT - SEA

1 stop4h 49mUnited Airlines

Wed 4/2312:55 pmSEA - ONT

1 stop7h 26mUnited Airlines

Deal found 1/12

$212

Fri 4/43:55 pmONT - PDX

1 stop4h 14mUnited Airlines

Tue 4/81:39 pmPDX - ONT

1 stop4h 12mUnited Airlines

Deal found 1/13

$215

Thu 5/16:24 pmONT - GEG

1 stop4h 40mAlaska Airlines

Thu 5/88:03 amGEG - ONT

1 stop7h 29mAlaska Airlines

Deal found 1/12

$218

Wed 1/2212:48 pmONT - SEA

1 stop7h 12mAmerican Airlines

Sat 2/16:10 amSEA - ONT

1 stop5h 48mAmerican Airlines

Deal found 1/11

$218

Best flights from Ontario to Washington
Discover carefully curated flight deals from Ontario to Washington that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated January 13, 2025.

Mon 2/38:01 amONT - PDX

Nonstop2h 26mFrontier

Tue 2/47:35 amPDX - ONT

1 stop16h 12mFrontier

Deal found 1/13

$102

Wed 5/1411:46 amONT - SEA

Nonstop2h 45mMultiple Airlines

Thu 5/229:39 amSEA - ONT

Nonstop2h 40mMultiple Airlines

Deal found 1/12

$113

Tue 2/46:00 amONT - SEA

Nonstop2h 54mAlaska Airlines

Wed 2/58:00 amSEA - ONT

Nonstop2h 38mAlaska Airlines

Deal found 1/12

$137

Tue 2/46:00 amONT - SEA

Nonstop2h 55mDelta

Thu 2/612:40 pmSEA - ONT

Nonstop2h 45mDelta

Deal found 1/13

$147

Tue 1/2812:48 pmONT - PDX

1 stop7h 57mAmerican Airlines

Thu 2/68:24 amPDX - ONT

1 stop7h 05mAmerican Airlines

Deal found 1/12

$189

Fri 2/2111:25 amONT - SEA

Nonstop2h 51mFrontier

Mon 2/241:36 pmSEA - ONT

Nonstop2h 37mFrontier

Deal found 1/12

$106

Sun 4/207:05 amONT - SEA

1 stop4h 49mUnited Airlines

Wed 4/2312:55 pmSEA - ONT

1 stop7h 26mUnited Airlines

Deal found 1/12

$212

Sat 2/18:10 amONT - SEA

1 stop10h 15mSouthwest

Wed 2/510:00 amSEA - ONT

1 stop12h 20mSouthwest

Deal found 1/12

$258

Mon 1/278:01 amONT - PDX

Nonstop2h 26mMultiple Airlines

Wed 1/298:13 amPDX - ONT

Nonstop2h 21mMultiple Airlines

Deal found 1/12

$133

Sat 2/85:44 pmONT - PDX

Nonstop2h 26mAlaska Airlines

Wed 2/128:13 amPDX - ONT

Nonstop2h 21mAlaska Airlines

Deal found 1/12

$157

Sun 2/26:00 amONT - GEG

1 stop6h 45mDelta

Thu 2/69:15 amGEG - ONT

1 stop6h 10mDelta

Deal found 1/12

$219

Thu 5/16:24 pmONT - GEG

1 stop4h 40mAlaska Airlines

Thu 5/88:03 amGEG - ONT

1 stop7h 29mAlaska Airlines

Deal found 1/12

$218

Last-minute flights from Ontario to Washington
Discover last-minute flight deals from Ontario to Washington. Data last updated January 13, 2025 and is based on user searches.

Sun 1/195:10 amONT - PDX

1 stop8h 40mUnited Airlines

Sun 1/265:00 amPDX - ONT

1 stop7h 41mUnited Airlines

Deal found 1/12

$293

Sun 1/198:30 amONT - PDX

1 stop8h 15mSouthwest

Sat 2/110:10 amPDX - ONT

2 stops6h 50mSouthwest

Deal found 1/13

$362

Mon 1/208:01 amONT - PDX

Nonstop2h 26mFrontier

Sun 1/2612:03 pmPDX - ONT

1 stop21h 37mFrontier

Deal found 1/12

$154

Mon 1/207:00 amONT - SEA

1 stop4h 23mMultiple Airlines

Thu 1/234:35 pmSEA - ONT

Nonstop2h 37mMultiple Airlines

Deal found 1/12

$227

Wed 1/2212:34 pmONT - SEA

1 stop21h 06mFrontier

Sun 1/264:35 pmSEA - ONT

Nonstop2h 37mFrontier

Deal found 1/12

$119

Wed 1/2211:14 amONT - PDX

Nonstop2h 24mMultiple Airlines

Mon 1/2710:35 amPDX - ONT

Nonstop2h 21mMultiple Airlines

Deal found 1/12

$173

Wed 1/224:05 pmONT - SEA

Nonstop2h 55mDelta

Sat 2/112:40 pmSEA - ONT

Nonstop2h 45mDelta

Deal found 1/11

$197

Wed 1/2212:48 pmONT - SEA

1 stop7h 12mAmerican Airlines

Sat 2/16:10 amSEA - ONT

1 stop5h 48mAmerican Airlines

Deal found 1/11

$218

Wed 1/226:00 amONT - SEA

Nonstop2h 54mAlaska Airlines

Tue 1/2811:36 amSEA - ONT

1 stop5h 28mAlaska Airlines

Deal found 1/12

$257

Wed 1/221:45 pmONT - SEA

1 stop9h 24mUnited Airlines

Wed 1/2912:35 pmSEA - ONT

1 stop8h 16mUnited Airlines

Deal found 1/12

$267

Thu 1/236:39 pmONT - PDX

Nonstop2h 26mAlaska Airlines

Thu 1/307:55 pmPDX - ONT

Nonstop2h 18mAlaska Airlines

Deal found 1/13

$217

Thu 1/236:00 amONT - PDX

1 stop6h 31mDelta

Wed 1/295:10 amPDX - ONT

1 stop7h 16mDelta

Deal found 1/12

$237

One-way flights from Ontario to Washington
Search for one-way flight options from Ontario to Washington. Find affordable one-way fares based on user searches. Data last updated January 13, 2025.

Mon 1/278:01 amONT - PDX

Nonstop2h 26mFrontier

Deal found 1/13

$39

Wed 2/122:43 pmONT - SEA

1 stop18h 52mFrontier

Deal found 1/13

$65

Wed 2/126:00 amONT - SEA

Nonstop2h 54mAlaska Airlines

Deal found 1/13

$69

Tue 3/114:20 pmONT - PDX

1 stop6h 36mAlaska Airlines

Deal found 1/13

$88

Thu 3/131:40 pmONT - SEA

1 stop9h 21mUnited Airlines

Deal found 1/13

$89

Wed 1/2210:00 amONT - PDX

1 stop6h 51mAmerican Airlines

Deal found 1/11

$108

Wed 4/166:00 amONT - GEG

1 stop6h 34mAlaska Airlines

Deal found 1/13

$109

Wed 1/224:05 pmONT - PDX

1 stop7h 53mDelta

Deal found 1/13

$109

Sat 5/31:45 pmONT - PDX

1 stop6h 52mUnited Airlines

Deal found 1/13

$114

Tue 1/216:00 amONT - SEA

Nonstop2h 55mDelta

Deal found 1/12

$129

Sun 1/196:10 amONT - SEA

1 stop7h 52mAmerican Airlines

Deal found 1/11

$139

Sat 3/11:44 pmONT - GEG

1 stop6h 54mUnited Airlines

Deal found 1/12

$145

Find flights from Ontario to Washington within your budget

Fly from

Fly to

Route

Depart

Return

Price

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Mon 2/3

8:01 am-10:27 am

Nonstop2h 26m

Portland

Tue 2/4

7:35 am-11:47 pm

1 stop16h 12m

$102

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Fri 2/21

11:25 am-2:16 pm

Nonstop2h 51m

Seattle/Tacoma Intl

Mon 2/24

1:36 pm-4:13 pm

Nonstop2h 37m

$106

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Wed 5/14

11:46 am-2:31 pm

Nonstop2h 45m

Seattle/Tacoma Intl

Thu 5/22

9:39 am-12:19 pm

Nonstop2h 40m

$113

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Mon 1/27

8:01 am-10:27 am

Nonstop2h 26m

Portland

Wed 1/29

8:13 am-10:34 am

Nonstop2h 21m

$133

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Tue 2/4

4:06 pm-6:59 pm

Nonstop2h 53m

Seattle/Tacoma Intl

Wed 2/5

8:00 am-10:38 am

Nonstop2h 38m

$137

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Tue 2/4

6:00 am-8:55 am

Nonstop2h 55m

Seattle/Tacoma Intl

Thu 2/6

12:40 pm-3:25 pm

Nonstop2h 45m

$147

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 2/8

5:44 pm-8:10 pm

Nonstop2h 26m

Portland

Wed 2/12

8:13 am-10:34 am

Nonstop2h 21m

$157

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Tue 1/28

12:48 pm-8:45 pm

1 stop7h 57m

Portland

Thu 2/6

11:36 am-6:24 pm

1 stop6h 48m

$189

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Thu 2/20

1:21 pm-6:16 pm

1 stop4h 55m

Portland

Mon 2/24

5:15 pm-10:32 pm

1 stop5h 17m

$197

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Sun 4/20

7:05 am-11:54 am

1 stop4h 49m

Seattle/Tacoma Intl

Wed 4/23

12:55 pm-8:21 pm

1 stop7h 26m

$212

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/13

Showing 1-10 of 50 results

...

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.

$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 1/31. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ontario to Washington with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Ontario to Washington

Round-trip from

One-way from

Find flight deals from Ontario to Washington

Cheapest flights from Ontario to WashingtonExplore 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 13, 2025.

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 13, 2025.

Find flights from Ontario to Washington within your budget

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.

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 13, 2025.