Direct flights from Ontario

Enter your travel dates to find the best prices.

Cheapest flights from Ontario
Explore the most affordable flight options available from Ontario. Find the lowest fares based on data from user searches, with prices last updated on 4 November 2025.

Wed 3/1207:10ONT - PDX

Nonstop2h 31mAlaska Airlines

Sat 6/1210:30PDX - ONT

Nonstop2h 16mAlaska Airlines

Deal found 2/11$275

Thu 25/1207:00ONT - PDX

Nonstop2h 29mAlaska Airlines

Tue 30/1221:38PDX - ONT

Nonstop2h 21mAlaska Airlines

Deal found 4/11$292

Thu 25/1218:05ONT - PDX

Nonstop2h 25mAlaska Airlines

Mon 5/114:55PDX - ONT

Nonstop2h 16mAlaska Airlines

Deal found 3/11$310

Tue 2/1207:10ONT - PDX

Nonstop2h 31mAlaska Airlines

Wed 10/1210:30PDX - ONT

Nonstop2h 16mAlaska Airlines

Deal found 2/11$327

Thu 1/107:00ONT - PDX

Nonstop2h 29mAlaska Airlines

Sun 4/121:38PDX - ONT

Nonstop2h 21mAlaska Airlines

Deal found 3/11$345

Sun 7/1207:10ONT - PDX

Nonstop2h 31mAlaska Airlines

Tue 9/1210:30PDX - ONT

Nonstop2h 16mAlaska Airlines

Deal found 2/11$362

Mon 29/1207:00ONT - PDX

Nonstop2h 29mAlaska Airlines

Sat 3/121:38PDX - ONT

Nonstop2h 21mAlaska Airlines

Deal found 3/11$373

Sun 7/1207:10ONT - PDX

Nonstop2h 31mAlaska Airlines

Mon 8/1217:45PDX - ONT

Nonstop2h 18mAlaska Airlines

Deal found 2/11$380

Mon 29/1207:00ONT - PDX

Nonstop2h 29mAlaska Airlines

Fri 2/121:38PDX - ONT

Nonstop2h 21mAlaska Airlines

Deal found 3/11$390

Mon 29/1207:00ONT - PDX

Nonstop2h 29mAlaska Airlines

Thu 1/114:55PDX - ONT

Nonstop2h 16mAlaska Airlines

Deal found 2/11$397

Sun 21/1218:05ONT - PDX

Nonstop2h 25mAlaska Airlines

Tue 23/1221:38PDX - ONT

Nonstop2h 21mAlaska Airlines

Deal found 3/11$415

Tue 25/1107:00ONT - PDX

Nonstop2h 27mAlaska Airlines

Tue 2/1217:45PDX - ONT

Nonstop2h 18mAlaska Airlines

Deal found 3/11$423

Last-minute flights from Ontario
Discover last-minute flight deals departing from Ontario. Data was last updated 4 November 2025 and is based on user searches.

Sun 9/1107:20ONT - PDX

Nonstop2h 30mAlaska Airlines

Sun 9/1121:32PDX - ONT

Nonstop2h 24mAlaska Airlines

Deal found 2/11$677

Tue 11/1107:20ONT - PDX

Nonstop2h 30mAlaska Airlines

Thu 13/1121:32PDX - ONT

Nonstop2h 24mAlaska Airlines

Deal found 3/11$770

Tue 11/1107:20ONT - PDX

Nonstop2h 30mAlaska Airlines

Fri 14/1121:32PDX - ONT

Nonstop2h 24mAlaska Airlines

Deal found 2/11$1,045

Wed 12/1118:03ONT - PDX

Nonstop2h 26mAlaska Airlines

Mon 1/1221:34PDX - ONT

Nonstop2h 21mAlaska Airlines

Deal found 2/11$616

Wed 12/1118:03ONT - PDX

Nonstop2h 26mAlaska Airlines

Mon 17/1121:32PDX - ONT

Nonstop2h 24mAlaska Airlines

Deal found 2/11$948

Thu 13/1118:03ONT - PDX

Nonstop2h 26mAlaska Airlines

Sun 16/1114:46PDX - ONT

Nonstop2h 23mAlaska Airlines

Deal found 4/11$607

Thu 13/1118:03ONT - PDX

Nonstop2h 26mAlaska Airlines

Sat 15/1121:32PDX - ONT

Nonstop2h 24mAlaska Airlines

Deal found 3/11$975

One-way flights from Ontario
Search for one-way flight options from Ontario. Find affordable one-way fares based on user searches. Data last updated 4 November 2025.

Tue 9/1207:10ONT - PDX

Nonstop2h 31mAlaska Airlines

Deal found 3/11$173

Thu 4/1213:26ONT - PDX

Nonstop2h 29mAlaska Airlines

Deal found 4/11$191

Tue 20/107:00ONT - PDX

Nonstop2h 33mAlaska Airlines

Deal found 3/11$226

Sun 15/307:00ONT - PDX

Nonstop2h 24mAlaska Airlines

Deal found 3/11$243

Tue 23/1218:05ONT - PDX

Nonstop2h 25mAlaska Airlines

Deal found 3/11$271

Thu 27/1107:00ONT - PDX

Nonstop2h 27mAlaska Airlines

Deal found 3/11$278

Mon 20/407:00ONT - PDX

Nonstop2h 24mAlaska Airlines

Deal found 3/11$296

Wed 19/1118:03ONT - PDX

Nonstop2h 26mAlaska Airlines

Deal found 2/11$313

Tue 25/1107:00ONT - PDX

Nonstop2h 27mAlaska Airlines

Deal found 3/11$322

Wed 12/1118:03ONT - PDX

Nonstop2h 26mAlaska Airlines

Deal found 4/11$339

Sat 6/1207:10ONT - PDX

Nonstop2h 31mAlaska Airlines

Deal found 1/11$357

Fri 21/1112:48ONT - PDX

Nonstop2h 25mAlaska Airlines

Deal found 4/11$366

Fly to

Route

Departure

Return

Price

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 10/12

07:10-09:41

Nonstop2h 31m

Portland

Tue 16/12

10:30-12:46

Nonstop2h 16m

$275

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 6/12

13:26-15:55

Nonstop2h 29m

Portland

Wed 10/12

10:30-12:46

Nonstop2h 16m

$275

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 3/12

07:10-09:41

Nonstop2h 31m

Portland

Wed 10/12

10:30-12:46

Nonstop2h 16m

$275

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 24/12

18:05-20:30

Nonstop2h 25m

Portland

Fri 2/1

21:38-23:59

Nonstop2h 21m

$292

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 3/12

07:10-09:41

Nonstop2h 31m

Portland

Mon 8/12

17:45-20:03

Nonstop2h 18m

$292

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 31/12

07:00-09:29

Nonstop2h 29m

Portland

Sun 4/1

09:49-12:08

Nonstop2h 19m

$292

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Mon 26/1

17:59-20:26

Nonstop2h 27m

Portland

Sat 31/1

14:43-17:03

Nonstop2h 20m

$292

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 6/12

13:26-15:55

Nonstop2h 29m

Portland

Sun 7/12

17:45-20:03

Nonstop2h 18m

$292

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 10/12

07:10-09:41

Nonstop2h 31m

Portland

Sun 14/12

17:45-20:03

Nonstop2h 18m

$292

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Mon 22/12

18:05-20:30

Nonstop2h 25m

Portland

Sat 3/1

21:38-23:59

Nonstop2h 21m

$292

Flights are sorted by cheapest return flights first.

Deals found on 3/11

Showing 1-10 of 19 results

Best time to book a flight from Ontario

Have a flexible travel schedule? Discover the best time to fly from Ontario with our price prediction graph.

Estimated return 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.

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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 31/1. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.

Direct flights from Ontario

Cheapest flights from Ontario
Explore the most affordable flight options available from Ontario. Find the lowest fares based on data from user searches, with prices last updated on 4 November 2025.

Explore the most affordable flight options available from Ontario. Find the lowest fares based on data from user searches, with prices last updated on 4 November 2025.

Last-minute flights from Ontario
Discover last-minute flight deals departing from Ontario. Data was last updated 4 November 2025 and is based on user searches.

Discover last-minute flight deals departing from Ontario. Data was last updated 4 November 2025 and is based on user searches.

One-way flights from Ontario
Search for one-way flight options from Ontario. Find affordable one-way fares based on user searches. Data last updated 4 November 2025.

Search for one-way flight options from Ontario. Find affordable one-way fares based on user searches. Data last updated 4 November 2025.

Find direct flights from Ontario within your budget

Best time to book a flight from Ontario

Have a flexible travel schedule? Discover the best time to fly from Ontario with our price prediction graph.

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Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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$173+ Direct flights from Ontario

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 31/1. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.

Direct flights from Ontario

Cheapest flights from OntarioExplore the most affordable flight options available from Ontario. Find the lowest fares based on data from user searches, with prices last updated on 4 November 2025.

Explore the most affordable flight options available from Ontario. Find the lowest fares based on data from user searches, with prices last updated on 4 November 2025.

Find direct flights from Ontario within your budget

Best time to book a flight from Ontario

Have a flexible travel schedule? Discover the best time to fly from Ontario with our price prediction graph.

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Direct flights from California cities

Book a direc flight from one of these other cities located in California.

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Ontario
Explore the most affordable flight options available from Ontario. Find the lowest fares based on data from user searches, with prices last updated on 4 November 2025.