$169+ Cheap flights from Ontario to Portland, ME (ONT - PWM)
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 5/12. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PWM
May 28 — Jun 41
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Portland with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Ontario to Portland
Cheapest
Best
Last-minute
One-way
Cheapest flights from Ontario to PortlandExplore the most affordable flight options available from Ontario to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 28, 2026.
Explore the most affordable flight options available from Ontario to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 28, 2026.
This Delta deal was found by Cheapflights users on 4/24. 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.
Tue 5/1212:08 pm
ONT
- PWM
1 stop8h 04m
Delta
Wed 5/272:05 pm
PWM
- ONT
2 stops12h 29m
Delta
Deal found 4/24![Delta logo]()
$322
This Delta deal was found by Cheapflights users on 4/23. 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.
Mon 8/1710:59 pm
ONT
- PWM
1 stop10h 23m
Delta
Tue 8/256:00 am
PWM
- ONT
1 stop8h 04m
Delta
Deal found 4/23![Delta logo]()
$323
This JetBlue deal was found by Cheapflights users on 4/23. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1111:50 pm
ONT
- PWM
1 stop10h 55m
JetBlue
Thu 8/202:40 pm
PWM
- ONT
1 stop10h 55m
JetBlue
Deal found 4/23![JetBlue logo]()
$329
This Delta deal was found by Cheapflights users on 4/23. 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.
Mon 8/1710:59 pm
ONT
- PWM
1 stop10h 23m
Delta
Thu 8/276:30 am
PWM
- ONT
2 stops14h 31m
Delta
Deal found 4/23![Delta logo]()
$354
This JetBlue deal was found by Cheapflights users on 4/23. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1011:50 pm
ONT
- PWM
1 stop9h 27m
JetBlue
Wed 8/192:40 pm
PWM
- ONT
1 stop10h 55m
JetBlue
Deal found 4/23![JetBlue logo]()
$366
This Delta deal was found by Cheapflights users on 4/23. 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.
Sun 8/2310:59 pm
ONT
- PWM
1 stop10h 23m
Delta
Tue 8/256:00 am
PWM
- ONT
1 stop8h 04m
Delta
Deal found 4/23![Delta logo]()
$373
This Delta deal was found by Cheapflights users on 4/23. 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.
Mon 8/1710:59 pm
ONT
- PWM
1 stop10h 23m
Delta
Fri 8/216:00 am
PWM
- ONT
1 stop8h 04m
Delta
Deal found 4/23![Delta logo]()
$379
This Delta deal was found by Cheapflights users on 4/23. 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.
Tue 8/1810:59 pm
ONT
- PWM
1 stop10h 23m
Delta
Tue 8/256:00 am
PWM
- ONT
1 stop8h 04m
Delta
Deal found 4/23![Delta logo]()
$389
This JetBlue deal was found by Cheapflights users on 4/25. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/2811:54 pm
ONT
- PWM
1 stop10h 41m
JetBlue
Tue 7/71:17 pm
PWM
- ONT
1 stop12h 18m
JetBlue
Deal found 4/25![JetBlue logo]()
$403
This Southwest deal was found by Cheapflights users on 4/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1711:55 pm
ONT
- PWM
2 stops9h 30m
Southwest
Thu 8/275:55 am
PWM
- ONT
2 stops11h 05m
Southwest
Deal found 4/23![Southwest logo]()
$409
Best flights from Ontario to PortlandDiscover carefully curated flight deals from Ontario to Portland that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 28, 2026.
Discover carefully curated flight deals from Ontario to Portland that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 28, 2026.
This Southwest deal was found by Cheapflights users on 4/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1711:55 pm
ONT
- PWM
2 stops9h 30m
Southwest
Thu 8/277:40 am
PWM
- ONT
1 stop11h 30m
Southwest
Deal found 4/23![Southwest logo]()
$410
This JetBlue deal was found by Cheapflights users on 4/25. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/311:50 pm
ONT
- PWM
1 stop9h 27m
JetBlue
Fri 8/72:49 pm
PWM
- ONT
1 stop10h 46m
JetBlue
Deal found 4/25![JetBlue logo]()
$436
This United Airlines deal was found by Cheapflights users on 4/23. 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.
Tue 8/259:01 am
ONT
- PWM
2 stops11h 58m
United Airlines
Wed 8/269:15 am
PWM
- ONT
2 stops13h 49m
United Airlines
Deal found 4/23![United Airlines logo]()
$469
This Delta deal was found by Cheapflights users on 4/27. 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.
Tue 5/1212:08 pm
ONT
- PWM
1 stop8h 04m
Delta
Sat 5/162:05 pm
PWM
- ONT
1 stop10h 43m
Delta
Deal found 4/27![Delta logo]()
$529
This Southwest deal was found by Cheapflights users on 4/25. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/299:40 pm
ONT
- PWM
1 stop9h 15m
Southwest
Tue 7/75:30 am
PWM
- ONT
1 stop9h 35m
Southwest
Deal found 4/25![Southwest logo]()
$474
This Southwest deal was found by Cheapflights users on 4/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2611:55 pm
ONT
- PWM
2 stops9h 50m
Southwest
Fri 10/96:30 am
PWM
- ONT
1 stop10h 55m
Southwest
Deal found 4/26![Southwest logo]()
$479
This United Airlines deal was found by Cheapflights users on 4/26. 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.
Sun 5/246:30 pm
ONT
- PWM
2 stops11h 41m
United Airlines
Wed 5/274:56 pm
PWM
- ONT
1 stop8h 55m
United Airlines
Deal found 4/26![United Airlines logo]()
$529
This Southwest deal was found by Cheapflights users on 4/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/48:35 am
ONT
- PWM
2 stops12h 30m
Southwest
Mon 6/83:10 pm
PWM
- ONT
2 stops11h 20m
Southwest
Deal found 4/26![Southwest logo]()
$480
Last-minute flights from Ontario to PortlandDiscover last-minute flight deals from Ontario to Portland. Data last updated April 28, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Portland. Data last updated April 28, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 4/23. 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.
Fri 5/86:59 pm
ONT
- PWM
2 stops12h 29m
United Airlines
Tue 5/124:50 pm
PWM
- ONT
1 stop8h 45m
United Airlines
Deal found 4/23![United Airlines logo]()
$438
This American Airlines deal was found by Cheapflights users on 4/23. 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 5/810:26 pm
ONT
- PWM
1 stop9h 49m
American Airlines
Tue 5/121:18 pm
PWM
- ONT
1 stop10h 09m
American Airlines
Deal found 4/23![American Airlines logo]()
$479
This Delta deal was found by Cheapflights users on 4/24. 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.
Tue 5/1212:08 pm
ONT
- PWM
1 stop8h 04m
Delta
Wed 5/272:05 pm
PWM
- ONT
2 stops12h 29m
Delta
Deal found 4/24![Delta logo]()
$322
This American Airlines deal was found by Cheapflights users on 4/24. 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.
Tue 5/1210:26 pm
ONT
- PWM
1 stop9h 49m
American Airlines
Wed 5/275:36 pm
PWM
- ONT
1 stop9h 23m
American Airlines
Deal found 4/24![American Airlines logo]()
$412
This United Airlines deal was found by Cheapflights users on 4/24. 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 5/276:30 pm
ONT
- PWM
2 stops11h 41m
United Airlines
Sat 5/305:03 pm
PWM
- ONT
1 stop8h 48m
United Airlines
Deal found 4/24![United Airlines logo]()
$492
One-way flights from Ontario to PortlandSearch for one-way flight options from Ontario to Portland. Find affordable one-way fares based on user searches. Data last updated April 28, 2026.
Search for one-way flight options from Ontario to Portland. Find affordable one-way fares based on user searches. Data last updated April 28, 2026.
This Delta deal was found by Cheapflights users on 4/23. 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.
Tue 5/1212:08 pm
ONT
- PWM
1 stop8h 04m
Delta
Deal found 4/23![Delta logo]()
$169
This American Airlines deal was found by Cheapflights users on 4/25. 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.
Tue 5/2611:59 pm
ONT
- PWM
2 stops13h 38m
American Airlines
Deal found 4/25![American Airlines logo]()
$185
This United Airlines deal was found by Cheapflights users on 4/27. 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.
Mon 5/186:59 pm
ONT
- PWM
2 stops12h 29m
United Airlines
Deal found 4/27![United Airlines logo]()
$194
This Kiwi.com deal was found by Cheapflights users on 4/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/268:06 pm
ONT
- PWM
3 stops44h 10m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$196
This American Airlines deal was found by Cheapflights users on 4/23. 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.
Mon 5/1111:29 pm
ONT
- PWM
1 stop10h 09m
American Airlines
Deal found 4/23![American Airlines logo]()
$205
This Delta deal was found by Cheapflights users on 4/23. 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.
Mon 5/1110:00 pm
ONT
- PWM
2 stops11h 38m
Delta
Deal found 4/23![Delta logo]()
$210
This Delta deal was found by Cheapflights users on 4/26. 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.
Mon 5/2512:07 pm
ONT
- PWM
1 stop8h 02m
Delta
Deal found 4/26![Delta logo]()
$220
This Southwest deal was found by Cheapflights users on 4/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/39:40 pm
ONT
- PWM
1 stop9h 15m
Southwest
Deal found 4/23![Southwest logo]()
$225
This Delta deal was found by Cheapflights users on 4/23. 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.
Mon 8/36:00 am
ONT
- PWM
2 stops14h 14m
Delta
Deal found 4/23![Delta logo]()
$230
This United Airlines deal was found by Cheapflights users on 4/26. 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 5/276:30 am
ONT
- PWM
1 stop8h 14m
United Airlines
Deal found 4/26![United Airlines logo]()
$235
This Kiwi.com deal was found by Cheapflights users on 4/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/128:06 pm
ONT
- PWM
3 stops44h 10m
Multiple Airlines
Deal found 4/23![Multiple Airlines logo]()
$240
This Kiwi.com deal was found by Cheapflights users on 4/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1111:36 am
ONT
- PWM
3 stops49h 40m
Multiple Airlines
Deal found 4/23![Multiple Airlines logo]()
$242
Find flight deals from Ontario to Portland
Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Portland (PWM). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 28, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $313 (United Airlines) |
One-way from | $169 (Delta) |
Popular in | March |
Cheapest in | October |
Average price | $415 |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Portland 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 2,558,603 searches. Data last updated April 28, 2026.
Use the filters below to find and compare flights from Ontario to Portland that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioPortland
ONT - PWM
ONTPWM
Ontario
Mon 8/17
11:55 pm-12:25 pm
2 stops9h 30m
Portland
Thu 8/27
7:40 am-4:10 pm
1 stop11h 30m
$410
OntarioPortland
ONT - PWM
ONTPWM
Ontario
Mon 8/3
11:50 pm-12:17 pm
1 stop9h 27m
Portland
Fri 8/7
2:49 pm-10:35 pm
1 stop10h 46m
$436
OntarioPortland
ONT - PWM
ONTPWM
Ontario
Tue 8/25
9:01 am-11:59 pm
2 stops11h 58m
Portland
Wed 8/26
9:15 am-8:04 pm
2 stops13h 49m
$469
OntarioPortland
ONT - PWM
ONTPWM
Ontario
Mon 6/29
9:40 pm-9:55 am
1 stop9h 15m
Portland
Tue 7/7
5:30 am-12:05 pm
1 stop9h 35m
$474
OntarioPortland
ONT - PWM
ONTPWM
Ontario
Sat 9/26
11:55 pm-12:45 pm
2 stops9h 50m
Portland
Fri 10/9
6:30 am-2:25 pm
1 stop10h 55m
$479
OntarioPortland
ONT - PWM
ONTPWM
Ontario
Thu 6/4
8:35 am-12:05 am
2 stops12h 30m
Portland
Mon 6/8
3:10 pm-11:30 pm
2 stops11h 20m
$480
Quickest round-trip
OntarioPortland
ONT - PWM
ONTPWM
Ontario
Tue 5/12
12:08 pm-11:12 pm
1 stop8h 04m
Portland
Sat 5/16
2:05 pm-9:48 pm
1 stop10h 43m
$529
OntarioPortland
ONT - PWM
ONTPWM
Ontario
Sun 5/24
6:30 pm-9:11 am
2 stops11h 41m
Portland
Wed 5/27
4:56 pm-10:51 pm
1 stop8h 55m
$529
Cheapest one-way
OntarioPortland
ONT - PWM
ONTPWM
Ontario
Tue 5/12
12:08 pm-11:12 pm
1 stop8h 04m
$169
OntarioPortland
ONT - PWM
ONTPWM
Ontario
Mon 5/11
10:00 pm-12:38 pm
2 stops11h 38m
$210
Showing 1-10 of 19 resultsSorted by cheapest first
Compare providers for flights from Ontario to Portland
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Portland in April.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Ontario-Portland, Maine flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Portland, Maine flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Portland, Maine flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Ontario-Portland, Maine flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Portland, Maine flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Ontario to Portland
Have a flexible travel schedule? Discover the best time to fly to Portland from Ontario with our price prediction graph.
ONT-PWM
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.
Cheapflights Insights
Everything you need to know about your flight from Ontario to Portland
Reviews of airlines servicing Portland
Get insights into the airlines that provide service to Portland. 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 Portland. Reviews last updated April 28, 2026.
Peruse reviews from past customers who have flown with Southwest,Delta, andUnited Airlines from Ontario to Portland to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Overall
8.0
Crew
8.6
Comfort
8.0
Boarding
8.1
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Overall
8.0
Crew
8.6
Comfort
8.0
Boarding
8.1
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Overall
8.0
Crew
8.6
Comfort
8.0
Boarding
8.1
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Overall
8.0
Crew
8.6
Comfort
8.0
Boarding
8.1
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Overall
8.0
Crew
8.6
Comfort
8.0
Boarding
8.1
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Related info for your journey
Find useful and relevant information for your journey from Ontario to Portland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Portland?
Book flights to Portland if you plan to visit one of these locationsNorth Conway
Brunswick
Lewiston
Conway
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.
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Alternative routes for Ontario to Portland
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Complete your trip
Complete your trip to Portland by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to Portland by cabin class
Find flights from Ontario to Portland, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ontario and Portland flights
Browse other Ontario and Portland flight options. Last updated on April 28, 2026.
Other flights from Ontario
Browse through other flights departing from Ontario. Flights are based on user searches made on Cheapflights and were last updated on April 28, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Portland
Explore flights to Portland departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on April 28, 2026.
Top 4 airlines flying from Ontario to Portland
Discover the top 4 airlines that operate flights from Ontario to Portland. 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 2,558,603 searches. Data last updated April 28, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$148 | Average$337 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$256 | Average$407 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$383 | Average$614 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$396 | Average$457 | FlexibilityNo cancel fee | On-time69% |