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 15 October 2025.

Sat 8/1118:03ONT - PDX

Nonstop2h 20mAlaska Airlines

Tue 11/1107:37PDX - ONT

Nonstop2h 21mAlaska Airlines

Deal found 14/10$275

Wed 24/1207:00ONT - PDX

Nonstop2h 29mAlaska Airlines

Mon 5/121:38PDX - ONT

Nonstop2h 21mAlaska Airlines

Deal found 15/10$293

Thu 13/1107:20ONT - PDX

Nonstop2h 30mAlaska Airlines

Sun 16/1121:32PDX - ONT

Nonstop2h 24mAlaska Airlines

Deal found 15/10$310

Thu 13/1118:03ONT - PDX

Nonstop2h 26mAlaska Airlines

Wed 19/1121:32PDX - ONT

Nonstop2h 24mAlaska Airlines

Deal found 13/10$328

Fri 21/1118:11ONT - PDX

Nonstop2h 25mAlaska Airlines

Sun 23/1121:34PDX - ONT

Nonstop2h 21mAlaska Airlines

Deal found 15/10$345

Mon 10/1107:20ONT - PDX

Nonstop2h 30mAlaska Airlines

Sat 22/1121:34PDX - ONT

Nonstop2h 21mAlaska Airlines

Deal found 13/10$363

Tue 11/1107:20ONT - PDX

Nonstop2h 30mAlaska Airlines

Sat 22/1121:34PDX - ONT

Nonstop2h 21mAlaska Airlines

Deal found 13/10$380

Mon 29/1207:00ONT - PDX

Nonstop2h 29mAlaska Airlines

Sun 4/121:38PDX - ONT

Nonstop2h 21mAlaska Airlines

Deal found 15/10$398

Wed 5/1118:03ONT - PDX

Nonstop2h 26mAlaska Airlines

Sun 9/1121:32PDX - ONT

Nonstop2h 24mAlaska Airlines

Deal found 13/10$401

Mon 10/1107:20ONT - PDX

Nonstop2h 30mAlaska Airlines

Thu 20/1121:32PDX - ONT

Nonstop2h 24mAlaska Airlines

Deal found 13/10$415

Tue 3/318:00ONT - PDX

Nonstop2h 23mAlaska Airlines

Thu 5/314:35PDX - ONT

Nonstop2h 18mAlaska Airlines

Deal found 12/10$417

Wed 24/1207:00ONT - PDX

Nonstop2h 29mAlaska Airlines

Sat 27/1221:38PDX - ONT

Nonstop2h 21mAlaska Airlines

Deal found 14/10$424

Last-minute flights from Ontario
Discover last-minute flight deals departing from Ontario. Data was last updated 15 October 2025 and is based on user searches.

Mon 20/1007:10ONT - PDX

Nonstop2h 20mAlaska Airlines

Tue 28/1007:37PDX - ONT

Nonstop2h 21mAlaska Airlines

Deal found 14/10$722

Mon 20/1017:45ONT - PDX

Nonstop2h 18mAlaska Airlines

Thu 23/1021:30PDX - ONT

Nonstop2h 21mAlaska Airlines

Deal found 14/10$809

Tue 21/1014:00ONT - PDX

Nonstop2h 19mAlaska Airlines

Sat 25/1021:30PDX - ONT

Nonstop2h 19mAlaska Airlines

Deal found 15/10$739

Tue 21/1007:10ONT - PDX

Nonstop2h 20mAlaska Airlines

Tue 28/1007:37PDX - ONT

Nonstop2h 21mAlaska Airlines

Deal found 14/10$906

Wed 22/1014:00ONT - PDX

Nonstop2h 19mAlaska Airlines

Fri 24/1021:30PDX - ONT

Nonstop2h 21mAlaska Airlines

Deal found 14/10$626

Wed 22/1017:45ONT - PDX

Nonstop2h 18mAlaska Airlines

Sat 25/1021:30PDX - ONT

Nonstop2h 19mAlaska Airlines

Deal found 15/10$923

Thu 23/1007:10ONT - PDX

Nonstop2h 20mAlaska Airlines

Wed 29/1007:37PDX - ONT

Nonstop2h 21mAlaska Airlines

Deal found 14/10$967

Thu 23/1007:10ONT - PDX

Nonstop2h 20mAlaska Airlines

Sun 26/1021:32PDX - ONT

Nonstop2h 24mAlaska Airlines

Deal found 14/10$1,072

Fri 24/1007:10ONT - PDX

Nonstop2h 20mAlaska Airlines

Wed 29/1021:32PDX - ONT

Nonstop2h 24mAlaska Airlines

Deal found 14/10$643

Fri 24/1007:10ONT - PDX

Nonstop2h 20mAlaska Airlines

Sun 26/1021:32PDX - ONT

Nonstop2h 24mAlaska Airlines

Deal found 14/10$731

Sat 25/1014:00ONT - PDX

Nonstop2h 19mAlaska Airlines

Fri 31/1014:40PDX - ONT

Nonstop2h 23mAlaska Airlines

Deal found 14/10$555

Sat 25/1007:10ONT - PDX

Nonstop2h 20mAlaska Airlines

Sun 26/1021:32PDX - ONT

Nonstop2h 24mAlaska Airlines

Deal found 14/10$1,011

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 15 October 2025.

Wed 12/1118:03ONT - PDX

Nonstop2h 26mAlaska Airlines

Deal found 15/10$173

Thu 13/1118:03ONT - PDX

Nonstop2h 26mAlaska Airlines

Deal found 15/10$191

Thu 8/117:59ONT - PDX

Nonstop2h 27mAlaska Airlines

Deal found 12/10$209

Tue 11/1107:20ONT - PDX

Nonstop2h 30mAlaska Airlines

Deal found 15/10$226

Thu 5/311:00ONT - PDX

Nonstop2h 27mAlaska Airlines

Deal found 12/10$228

Fri 10/418:00ONT - PDX

Nonstop2h 22mAlaska Airlines

Deal found 14/10$244

Tue 2/1207:10ONT - PDX

Nonstop2h 31mAlaska Airlines

Deal found 14/10$279

Tue 28/1010:59ONT - PDX

Nonstop2h 26mAlaska Airlines

Deal found 14/10$296

Wed 22/1017:45ONT - PDX

Nonstop2h 18mAlaska Airlines

Deal found 15/10$314

Sat 20/1207:00ONT - PDX

Nonstop2h 29mAlaska Airlines

Deal found 14/10$322

Thu 27/1107:00ONT - PDX

Nonstop2h 27mAlaska Airlines

Deal found 13/10$340

Mon 30/318:00ONT - PDX

Nonstop2h 22mAlaska Airlines

Deal found 13/10$349

Fly to

Route

Departure

Return

Price

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Thu 13/11

18:03-20:29

Nonstop2h 26m

Portland

Sat 15/11

14:46-17:05

Nonstop2h 19m

$293

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 24/12

07:00-09:29

Nonstop2h 29m

Portland

Mon 5/1

21:38-23:59

Nonstop2h 21m

$293

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 24/12

07:00-09:29

Nonstop2h 29m

Portland

Sun 4/1

21:38-23:59

Nonstop2h 21m

$293

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Tue 18/11

07:20-09:50

Nonstop2h 30m

Portland

Sun 23/11

21:34-23:55

Nonstop2h 21m

$293

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 28/2

18:00-20:23

Nonstop2h 23m

Portland

Mon 2/3

14:35-16:53

Nonstop2h 18m

$293

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Fri 14/11

10:59-13:25

Nonstop2h 26m

Portland

Tue 18/11

07:37-09:58

Nonstop2h 21m

$293

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Thu 11/12

07:10-09:41

Nonstop2h 31m

Portland

Sat 13/12

17:45-20:03

Nonstop2h 18m

$293

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 8/11

18:03-20:23

Nonstop2h 20m

Portland

Thu 13/11

21:32-23:56

Nonstop2h 24m

$293

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Wed 24/12

07:00-09:29

Nonstop2h 29m

Portland

Thu 1/1

21:38-23:59

Nonstop2h 21m

$293

OntarioPortland

ONT - PDX

ONTPDX

Ontario

Sat 8/11

18:03-20:23

Nonstop2h 20m

Portland

Sat 15/11

21:32-23:56

Nonstop2h 24m

$310

Flights are sorted by cheapest return flights first.

Deals found on 15/10

Showing 1-10 of 20 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 12/11. 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 15 October 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 15 October 2025.

Last-minute flights from Ontario
Discover last-minute flight deals departing from Ontario. Data was last updated 15 October 2025 and is based on user searches.

Discover last-minute flight deals departing from Ontario. Data was last updated 15 October 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 15 October 2025.

Search for one-way flight options from Ontario. Find affordable one-way fares based on user searches. Data last updated 15 October 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 12/11. 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 15 October 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 15 October 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 15 October 2025.