$43 Flight Deals from Portland to Ontario International Airport

Hotels
Cars
Flights
Bundle + Save
Cruises
Experiences

Top flight deals from leading airlines:

... and +100s more

Incredible Deals

Save up to 50% on select flights with Priceline

Bundle & Save

Save an average of $240 per person when bundling your flight and hotel together with Priceline

Best Price Guarantee

If a VIP member finds a better price elsewhere, we'll refund up to 200% of the difference

Help 24/7

We’re always here for you - reach us 24 hours a day, 7 days a week

Stops

Up to 1 stop

$156

Up to 2 stops

$266

Airlines

Alaska Airlines

$166

American Airlines

$228

Delta Air Lines

$156

Frontier Airlines

$270

Hahn Air

$335

Hawaiian Airlines

$267

Southwest Airlines

$261

United Airlines

$227

Cabin Class

Economy

$156

Departure Airports

Portland International Airport

$156

Arrival Airports

Ontario International Airport

$156

Layover Airports

Denver International Airport

$266

Harry Reid International Airport

$261

Mahlon Sweet Field

$166

Norman Y. Mineta San Jose International Airport

$256

Oakland International Airport

$261

Phoenix Sky Harbor International Airport

$228

Roberts Field

$367

Rogue Valley International Medford Airport

$324

Salt Lake City International Airport

$166

San Francisco International Airport

$196

Seattle Tacoma International Airport

$156

Spokane International Airport

$546

Best Price. GUARANTEED.

Exclusively for Priceline Members
Tired of searching? Book now!
We'll refund the difference if you find a lower price.

BUNDLE & SAVE

Book a flight & hotel together for extra savings.

On average save $240 per traveler

Delta Air Lines

04/22/25

7:23am

PDX

6h 32m

SEA

04/22/25

1:55pm

ONT

Delta Air Lines

04/22/25

4:19pm

ONT

2h 20m

Direct

04/22/25

6:39pm

PDX

^$156

Free cancellation within 83 hours of booking

Delta Air Lines

04/23/25

11:55am

PDX

4h 49m

SEA

04/23/25

4:44pm

ONT

Delta Air Lines

04/30/25

8:00pm

ONT

2h 22m

Direct

04/30/25

10:22pm

PDX

^$156

Free cancellation within 83 hours of booking

Delta Air Lines

04/23/25

5:15am

PDX

7h 1m

SLC

04/23/25

12:16pm

ONT

Delta Air Lines

04/30/25

7:00am

ONT

7h 30m

SEA

04/30/25

2:30pm

PDX

^$166

Free cancellation within 83 hours of booking

Delta Air Lines

04/22/25

7:23am

PDX

6h 32m

SEA

04/22/25

1:55pm

ONT

Delta Air Lines

04/22/25

3:58pm

ONT

7h 58m

SEA

04/22/25

11:56pm

PDX

^$166

Free cancellation within 83 hours of booking

Alaska Airlines

05/14/25

9:42pm

PDX

2h 16m

Direct

05/14/25

11:58pm

ONT

Alaska Airlines

05/16/25

8:03am

ONT

5h 33m

EUG

05/16/25

1:36pm

PDX

^$166

Free cancellation within 83 hours of booking

Alaska Airlines

05/01/25

11:35am

PDX

5h 55m

SEA

05/01/25

5:30pm

ONT

Alaska Airlines

05/06/25

5:00pm

ONT

4h 44m

SFO

05/06/25

9:44pm

PDX

^$196

Free cancellation within 83 hours of booking

Alaska Airlines

05/16/25

9:41pm

PDX

2h 16m

Direct

05/16/25

11:57pm

ONT

Alaska Airlines

05/17/25

8:03am

ONT

5h 33m

EUG

05/17/25

1:36pm

PDX

^$196

Free cancellation within 83 hours of booking

United Airlines

04/30/25

9:55am

PDX

4h 55m

SFO

04/30/25

2:50pm

ONT

United Airlines

05/06/25

3:14pm

ONT

5h 39m

SFO

05/06/25

8:53pm

PDX

^$227

Free cancellation within 83 hours of booking

United Airlines

05/06/25

10:00am

PDX

4h 25m

SFO

05/06/25

2:25pm

ONT

United Airlines

05/13/25

3:10pm

ONT

5h 43m

SFO

05/13/25

8:53pm

PDX

^$228

Free cancellation within 83 hours of booking

American Airlines

04/30/25

5:05am

PDX

6h 54m

PHX

04/30/25

11:59am

ONT

American Airlines

05/03/25

4:35pm

ONT

7h 27m

PHX

05/04/25

12:02am

PDX

^$228

Free cancellation within 83 hours of booking

United Airlines

05/10/25

1:45pm

PDX

6h 49m

SFO

05/10/25

8:34pm

ONT

United Airlines

05/13/25

10:44am

ONT

4h 10m

SFO

05/13/25

2:54pm

PDX

^$236

Free cancellation within 83 hours of booking

United Airlines

04/29/25

1:39pm

PDX

6h 42m

SFO

04/29/25

8:21pm

ONT

United Airlines

05/02/25

8:07pm

ONT

4h 24m

SFO

05/03/25

12:31am

PDX

^$237

Free cancellation within 83 hours of booking

American Airlines

04/30/25

5:05am

PDX

6h 54m

PHX

04/30/25

11:59am

ONT

American Airlines

05/03/25

7:39pm

ONT

2h 33m

Direct

05/03/25

10:12pm

PDX

^$238

Free cancellation within 83 hours of booking

Alaska Airlines

04/25/25

5:22pm

PDX

6h 37m

SEA

04/25/25

11:59pm

ONT

Alaska Airlines

04/30/25

12:49pm

ONT

6h 31m

SFO

04/30/25

7:20pm

PDX

^$239

Free cancellation within 83 hours of booking

United Airlines

04/23/25

1:45pm

PDX

6h 36m

SFO

04/23/25

8:21pm

ONT

United Airlines

04/28/25

7:00pm

ONT

5h 30m

SFO

04/29/25

12:30am

PDX

^$246

Free cancellation within 83 hours of booking

Alaska Airlines

04/21/25

1:25pm

PDX

4h 58m

SEA

04/21/25

6:23pm

ONT

Alaska Airlines

05/14/25

8:26am

ONT

5h 1m

SJC

05/14/25

1:27pm

PDX

^$256

Free cancellation within 83 hours of booking

American Airlines

05/04/25

11:35am

PDX

6h 45m

PHX

05/04/25

6:20pm

ONT

American Airlines

05/10/25

6:01am

ONT

4h 49m

PHX

05/10/25

10:50am

PDX

^$257

Free cancellation within 83 hours of booking

Southwest Airlines

05/04/25

6:15am

PDX

5h 20m

OAK

05/04/25

11:35am

ONT

Southwest Airlines

05/10/25

5:30am

ONT

4h 20m

LAS

05/10/25

9:50am

PDX

^$261

Free cancellation within 83 hours of booking

Southwest Airlines

05/04/25

9:50pm

PDX

11h 20m

PHX

05/05/25

9:10am

ONT

Southwest Airlines

05/10/25

12:50pm

ONT

9h 35m

SJC

DEN

05/10/25

10:25pm

PDX

^$266

Free cancellation within 83 hours of booking

Hawaiian Airlines

04/25/25

10:00pm

PDX

12h 51m

SEA

04/26/25

10:51am

ONT

Hawaiian Airlines

04/30/25

6:00am

ONT

4h 52m

SEA

04/30/25

10:52am

PDX

^$267

Free cancellation within 83 hours of booking

Frontier Airlines

05/04/25

6:20am

PDX

17h 39m

DEN

05/04/25

11:59pm

ONT

Frontier Airlines

05/10/25

12:59am

ONT

23h 39m

DEN

05/11/25

12:38am

PDX

^$270

Free cancellation within 83 hours of booking

American Airlines

05/06/25

5:05am

PDX

6h 45m

PHX

05/06/25

11:50am

ONT

American Airlines

05/13/25

7:25pm

ONT

4h 32m

PHX

05/13/25

11:57pm

PDX

^$272

Free cancellation within 83 hours of booking

Hawaiian Airlines

04/18/25

6:00am

PDX

4h 39m

SEA

04/18/25

10:39am

ONT

Hawaiian Airlines

04/21/25

6:00am

ONT

2h 32m

Direct

04/21/25

8:32am

PDX

^$281

Free cancellation within 83 hours of booking

American Airlines

04/26/25

8:45am

PDX

7h 14m

PHX

04/26/25

3:59pm

ONT

American Airlines

05/03/25

7:25pm

ONT

4h 37m

PHX

05/04/25

12:02am

PDX

^$306

Free cancellation within 83 hours of booking

Hawaiian Airlines

04/21/25

5:08am

PDX

5h 31m

SEA

04/21/25

10:39am

ONT

Hawaiian Airlines

04/24/25

9:25am

ONT

4h 22m

MFR

04/24/25

1:47pm

PDX

^$324

Free cancellation within 83 hours of booking

Hahn Air

05/07/25

9:42pm

PDX

2h 16m

Direct

05/07/25

11:58pm

ONT

Hahn Air

05/13/25

3:37pm

ONT

6h 7m

SFO

05/13/25

9:44pm

PDX

^$335

Free cancellation within 83 hours of booking

Alaska Airlines

05/02/25

2:32pm

PDX

9h 27m

RDM

SEA

05/02/25

11:59pm

ONT

Alaska Airlines

05/09/25

11:46am

ONT

5h 2m

SEA

05/09/25

4:48pm

PDX

^$367

Free cancellation within 83 hours of booking

Hawaiian Airlines

05/11/25

6:00am

PDX

4h 51m

SEA

05/11/25

10:51am

ONT

Hawaiian Airlines

05/18/25

6:00am

ONT

6h 18m

SEA

05/18/25

12:18pm

PDX

^$462

Free cancellation within 83 hours of booking

Alaska Airlines

05/02/25

2:32pm

PDX

9h 27m

RDM

SEA

05/02/25

11:59pm

ONT

Alaska Airlines

05/09/25

11:46am

ONT

8h 48m

SEA

GEG

05/09/25

8:34pm

PDX

^$546

Free cancellation within 83 hours of booking

United Airlines

05/15/25

7:54am

PDX

12h 59m

SFO

DEN

05/15/25

8:53pm

ONT

United Airlines

05/19/25

6:45pm

ONT

5h 46m

SFO

05/20/25

12:31am

PDX

^$664

Free cancellation within 83 hours of booking

Top Deals on flights from Portland to Ontario International Airport

Portland, US (PDX) - Los Angeles, US (LAX)

Frontier Airlines

May 30

11:04am

PDX

2h 20m

Direct

May 30

1:24pm

ONT

as low as

$43

Portland, US (PDX) - Los Angeles, US (LAX)

Alaska Airlines

Jun 14

9:41pm

PDX

2h 18m

Direct

Jun 14

11:59pm

ONT

as low as

$78

Portland, US (PDX) - Los Angeles, US (LAX)

Hawaiian Airlines

Jun 14

9:41pm

PDX

2h 18m

Direct

Jun 14

11:59pm

ONT

as low as

$85

Portland, US (PDX) - Los Angeles, US (LAX)

Delta Air Lines

Jun 1

5:35am

PDX

5h 29m

SEA

Jun 1

11:04am

ONT

as low as

$98

Portland, US (PDX) - Los Angeles, US (LAX)

United Airlines

Jun 11

7:40am

PDX

4h 34m

SFO

Jun 11

12:14pm

ONT

as low as

$114

Portland, US (PDX) - Los Angeles, US (LAX)

American Airlines

Jun 3

5:05am

PDX

6h 45m

PHX

Jun 3

11:50am

ONT

as low as

$114

Portland, US (PDX) - Los Angeles, US (LAX)

Frontier Airlines

Jul 30

5:50pm

PDX

DEN

Jul 30

11:50pm

ONT

as low as

$134

Portland, US (PDX) - Los Angeles, US (LAX)

Southwest Airlines

Jun 9

5:20am

PDX

6h 45m

OAK

Jun 9

12:05pm

ONT

as low as

$138

Portland, US (PDX) - Los Angeles, US (LAX)

Hahn Air

Jun 14

9:41pm

PDX

2h 18m

Direct

Jun 14

11:59pm

ONT

as low as

$139

Portland, US (PDX) - Los Angeles, US (LAX)

Frontier Airlines

Jun 23

1:45pm

PDX

7h 6m

LAS

Jun 23

8:51pm

ONT

as low as

$154

Portland, US (PDX) - Los Angeles, US (LAX)

Alaska Airlines

Jun 7

2:30pm

PDX

8h 16m

GEG

SEA

Jun 7

10:46pm

ONT

as low as

$279

Portland, US (PDX) - Los Angeles, US (LAX)

American Airlines

Jun 9

7:55am

PDX

13h 43m

LAX

PHX

Jun 9

9:38pm

ONT

as low as

$316

Flights to Los Angeles

Return flights

Flights From Ontario International Airport To Portland

Browse origins

Flights
North America
United States
Oregon
Portland

Browse destinations

Flights
North America
United States
California
Los Angeles
Ontario International Airport

Priceline is part of Booking Holdings, the world leader in online travel & related services.

Flight Deals from Portland to Ontario International Airport from $43

Stops

Airlines

Cabin Class

Departure Airports

Arrival Airports

Layover Airports

Best Price. GUARANTEED.

Top Deals on flights from Portland to Ontario International Airport

Flights to Los Angeles

Return flights

Browse origins

Browse destinations

Top Flight Routes Destinations