$133+ Cheap flights from Portland, ME to Ontario (PWM - ONT)
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 8/20. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — ONT
Jul 5 — Jul 121
Round-trip
1 adult, Economy
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Find cheap flights from Portland to Ontario 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
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Cheapest flights from Portland to OntarioExplore the most affordable flight options available from Portland to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 5, 2026.
Explore the most affordable flight options available from Portland to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 5, 2026.
This Delta deal was found by Cheapflights users on 6/1. 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.
Thu 8/202:14 pm
PWM
- ONT
1 stop10h 38m
Delta
Wed 8/2612:00 pm
ONT
- PWM
1 stop8h 13m
Delta
Deal found 6/1![Delta logo]()
$314
This JetBlue deal was found by Cheapflights users on 6/1. 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.
Wed 8/192:40 pm
PWM
- ONT
1 stop10h 55m
JetBlue
Mon 8/2411:50 pm
ONT
- PWM
1 stop9h 31m
JetBlue
Deal found 6/1![JetBlue logo]()
$329
This Delta deal was found by Cheapflights users on 6/1. 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.
Thu 8/202:14 pm
PWM
- ONT
1 stop10h 38m
Delta
Thu 8/2712:00 pm
ONT
- PWM
1 stop8h 13m
Delta
Deal found 6/1![Delta logo]()
$331
This Delta deal was found by Cheapflights users on 6/1. 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.
Thu 8/202:14 pm
PWM
- ONT
1 stop10h 38m
Delta
Fri 8/2812:00 pm
ONT
- PWM
1 stop8h 13m
Delta
Deal found 6/1![Delta logo]()
$341
This American Airlines deal was found by Cheapflights users on 6/2. 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.
Wed 12/165:46 am
PWM
- ONT
2 stops11h 14m
American Airlines
Wed 1/69:59 am
ONT
- PWM
2 stops9h 55m
American Airlines
Deal found 6/2![American Airlines logo]()
$361
This JetBlue deal was found by Cheapflights users on 6/4. 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.
Wed 8/192:40 pm
PWM
- ONT
1 stop10h 55m
JetBlue
Wed 8/2611:50 pm
ONT
- PWM
1 stop10h 55m
JetBlue
Deal found 6/4![JetBlue logo]()
$362
This JetBlue deal was found by Cheapflights users on 5/31. 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.
Wed 7/82:40 pm
PWM
- ONT
1 stop11h 04m
JetBlue
Tue 8/411:51 pm
ONT
- PWM
1 stop10h 54m
JetBlue
Deal found 5/31![JetBlue logo]()
$366
This Southwest deal was found by Cheapflights users on 6/3. 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.
Wed 7/225:30 am
PWM
- ONT
1 stop9h 35m
Southwest
Wed 7/298:30 am
ONT
- PWM
2 stops11h 30m
Southwest
Deal found 6/3![Southwest logo]()
$377
This Delta deal was found by Cheapflights users on 6/2. 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.
Thu 8/202:14 pm
PWM
- ONT
1 stop10h 38m
Delta
Sun 8/2310:00 pm
ONT
- PWM
2 stops13h 13m
Delta
Deal found 6/2![Delta logo]()
$390
This JetBlue deal was found by Cheapflights users on 5/31. 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.
Wed 7/82:40 pm
PWM
- ONT
1 stop11h 04m
JetBlue
Wed 8/511:51 pm
ONT
- PWM
1 stop10h 54m
JetBlue
Deal found 5/31![JetBlue logo]()
$403
This Southwest deal was found by Cheapflights users on 6/3. 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.
Tue 7/145:30 am
PWM
- ONT
1 stop9h 35m
Southwest
Mon 7/209:40 pm
ONT
- PWM
1 stop9h 15m
Southwest
Deal found 6/3![Southwest logo]()
$406
This Expedia deal was found by Cheapflights users on 6/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/91:12 pm
PWM
- ONT
1 stop12h 23m
JetBlue
Sat 8/1511:24 pm
ONT
- PWM
1 stop9h 53m
JetBlue
Deal found 6/2![JetBlue logo]()
$410
Best flights from Portland to OntarioDiscover carefully curated flight deals from Portland to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 5, 2026.
Discover carefully curated flight deals from Portland to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 5, 2026.
This Southwest deal was found by Cheapflights users on 6/3. 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.
Wed 7/225:30 am
PWM
- ONT
2 stops10h 10m
Southwest
Wed 7/298:30 am
ONT
- PWM
2 stops11h 30m
Southwest
Deal found 6/3![Southwest logo]()
$403
This Delta deal was found by Cheapflights users on 6/4. 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.
Thu 8/202:14 pm
PWM
- ONT
1 stop10h 38m
Delta
Sun 8/2312:00 pm
ONT
- PWM
1 stop8h 13m
Delta
Deal found 6/4![Delta logo]()
$445
This United Airlines deal was found by Cheapflights users on 5/31. 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.
Sat 9/2611:35 am
PWM
- ONT
2 stops14h 24m
United Airlines
Tue 9/296:00 am
ONT
- PWM
2 stops14h 27m
United Airlines
Deal found 5/31![United Airlines logo]()
$508
This JetBlue deal was found by Cheapflights users on 6/3. 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.
Thu 8/202:40 pm
PWM
- ONT
1 stop10h 55m
JetBlue
Fri 8/2811:50 pm
ONT
- PWM
1 stop10h 55m
JetBlue
Deal found 6/3![JetBlue logo]()
$602
This Southwest deal was found by Cheapflights users on 6/2. 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 7/273:20 pm
PWM
- ONT
2 stops11h 15m
Southwest
Wed 7/298:30 am
ONT
- PWM
2 stops11h 30m
Southwest
Deal found 6/2![Southwest logo]()
$450
This Delta deal was found by Cheapflights users on 5/31. 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.
Thu 10/221:35 pm
PWM
- ONT
1 stop11h 39m
Delta
Sun 11/110:59 pm
ONT
- PWM
1 stop10h 19m
Delta
Deal found 5/31![Delta logo]()
$456
This Delta deal was found by Cheapflights users on 5/31. 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.
Fri 10/231:35 pm
PWM
- ONT
1 stop11h 39m
Delta
Thu 10/2910:59 pm
ONT
- PWM
1 stop10h 19m
Delta
Deal found 5/31![Delta logo]()
$456
This Southwest deal was found by Cheapflights users on 6/5. 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.
Fri 7/35:20 pm
PWM
- ONT
1 stop8h 05m
Southwest
Fri 7/108:35 am
ONT
- PWM
2 stops12h 35m
Southwest
Deal found 6/5![Southwest logo]()
$458
This Delta deal was found by Cheapflights users on 5/31. 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 11/231:35 pm
PWM
- ONT
1 stop11h 39m
Delta
Tue 11/2410:59 pm
ONT
- PWM
1 stop10h 19m
Delta
Deal found 5/31![Delta logo]()
$487
This Southwest deal was found by Cheapflights users on 6/2. 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.
Wed 7/85:30 am
PWM
- ONT
2 stops10h 10m
Southwest
Sat 7/189:50 am
ONT
- PWM
2 stops10h 55m
Southwest
Deal found 6/2![Southwest logo]()
$507
This Delta deal was found by Cheapflights users on 6/5. 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 8/184:47 pm
PWM
- ONT
2 stops9h 47m
Delta
Mon 9/1411:59 am
ONT
- PWM
1 stop8h 26m
Delta
Deal found 6/5![Delta logo]()
$530
Last-minute flights from Portland to OntarioDiscover last-minute flight deals from Portland to Ontario. Data last updated June 5, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Ontario. Data last updated June 5, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 6/5. 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.
Fri 7/35:20 pm
PWM
- ONT
1 stop8h 05m
Southwest
Fri 7/108:35 am
ONT
- PWM
2 stops12h 35m
Southwest
Deal found 6/5![Southwest logo]()
$458
This JetBlue deal was found by Cheapflights users on 5/31. 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.
Wed 7/82:40 pm
PWM
- ONT
1 stop11h 04m
JetBlue
Mon 8/311:51 pm
ONT
- PWM
1 stop9h 25m
JetBlue
Deal found 5/31![JetBlue logo]()
$366
This JetBlue deal was found by Cheapflights users on 5/31. 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.
Wed 7/82:40 pm
PWM
- ONT
1 stop11h 04m
JetBlue
Wed 8/511:51 pm
ONT
- PWM
1 stop10h 54m
JetBlue
Deal found 5/31![JetBlue logo]()
$403
This JetBlue deal was found by Cheapflights users on 5/31. 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.
Wed 7/82:40 pm
PWM
- ONT
1 stop11h 04m
JetBlue
Thu 8/611:50 pm
ONT
- PWM
1 stop11h 04m
JetBlue
Deal found 5/31![JetBlue logo]()
$452
This Southwest deal was found by Cheapflights users on 6/3. 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.
Tue 7/145:30 am
PWM
- ONT
1 stop9h 35m
Southwest
Mon 7/209:40 pm
ONT
- PWM
1 stop9h 15m
Southwest
Deal found 6/3![Southwest logo]()
$406
This JetBlue deal was found by Cheapflights users on 6/1. 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.
Wed 7/152:40 pm
PWM
- ONT
1 stop10h 55m
JetBlue
Sat 7/2511:18 pm
ONT
- PWM
1 stop10h 12m
JetBlue
Deal found 6/1![JetBlue logo]()
$501
This Southwest deal was found by Cheapflights users on 6/3. 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.
Wed 7/225:30 am
PWM
- ONT
1 stop9h 35m
Southwest
Wed 7/298:30 am
ONT
- PWM
2 stops11h 30m
Southwest
Deal found 6/3![Southwest logo]()
$377
This Southwest deal was found by Cheapflights users on 6/2. 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 7/273:20 pm
PWM
- ONT
2 stops11h 15m
Southwest
Wed 7/298:30 am
ONT
- PWM
2 stops11h 30m
Southwest
Deal found 6/2![Southwest logo]()
$450
One-way flights from Portland to OntarioSearch for one-way flight options from Portland to Ontario. Find affordable one-way fares based on user searches. Data last updated June 5, 2026.
Search for one-way flight options from Portland to Ontario. Find affordable one-way fares based on user searches. Data last updated June 5, 2026.
This JetBlue deal was found by Cheapflights users on 6/4. 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.
Thu 8/202:40 pm
PWM
- ONT
1 stop10h 55m
JetBlue
Deal found 6/4![JetBlue logo]()
$133
This Priceline deal was found by Cheapflights users on 6/5. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/11:17 pm
PWM
- ONT
1 stop12h 18m
JetBlue
Deal found 6/5![JetBlue logo]()
$138
This Delta deal was found by Cheapflights users on 6/5. 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.
Thu 8/2712:47 pm
PWM
- ONT
2 stops13h 47m
Delta
Deal found 6/5![Delta logo]()
$154
This Priceline deal was found by Cheapflights users on 6/2. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/212:49 pm
PWM
- ONT
1 stop10h 46m
JetBlue
Deal found 6/2![JetBlue logo]()
$165
This Delta deal was found by Cheapflights users on 6/2. 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.
Fri 7/31:55 pm
PWM
- ONT
1 stop10h 53m
Delta
Deal found 6/2![Delta logo]()
$176
This JetBlue deal was found by Cheapflights users on 6/2. 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.
Wed 7/82:40 pm
PWM
- ONT
1 stop11h 04m
JetBlue
Deal found 6/2![JetBlue logo]()
$202
This Kiwi.com deal was found by Cheapflights users on 6/2. 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 7/277:00 am
PWM
- ONT
2 stops28h 03m
Multiple Airlines
Deal found 6/2![Multiple Airlines logo]()
$215
This United Airlines deal was found by Cheapflights users on 5/31. 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.
Thu 8/205:03 pm
PWM
- ONT
1 stop8h 32m
United Airlines
Deal found 5/31![United Airlines logo]()
$221
This American Airlines deal was found by Cheapflights users on 6/3. 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 8/148:00 am
PWM
- ONT
1 stop8h 31m
American Airlines
Deal found 6/3![American Airlines logo]()
$222
This United Airlines deal was found by Cheapflights users on 6/5. 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 9/15:03 pm
PWM
- ONT
1 stop8h 32m
United Airlines
Deal found 6/5![United Airlines logo]()
$231
Find flight deals from Portland to Ontario
Discover tips and strategies to find the most affordable flight options for your journey from Portland (PWM) to Ontario (ONT). 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 June 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $314 (Delta) |
One-way from | $133 (JetBlue) |
Popular in | June |
Cheapest in | September |
Average price | $474 |
Cheapflights Fare Finder
Customize your flight search to find flights from Portland to Ontario 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 June 5, 2026.
Use the filters below to find and compare flights from Portland to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
PortlandOntario
PWM - ONT
PWMONT
Portland
Wed 7/22
5:30 am-12:40 pm
2 stops10h 10m
Ontario
Wed 7/29
8:30 am-11:00 pm
2 stops11h 30m
$403
PortlandOntario
PWM - ONT
PWMONT
Portland
Thu 8/20
2:14 pm-9:52 pm
1 stop10h 38m
Ontario
Sun 8/23
12:00 pm-11:13 pm
1 stop8h 13m
$445
PortlandOntario
PWM - ONT
PWMONT
Portland
Mon 7/27
3:20 pm-11:35 pm
2 stops11h 15m
Ontario
Wed 7/29
8:30 am-11:00 pm
2 stops11h 30m
$450
PortlandOntario
PWM - ONT
PWMONT
Portland
Thu 10/22
1:35 pm-10:14 pm
1 stop11h 39m
Ontario
Sun 11/1
10:59 pm-12:18 pm
1 stop10h 19m
$456
PortlandOntario
PWM - ONT
PWMONT
Portland
Fri 10/23
1:35 pm-10:14 pm
1 stop11h 39m
Ontario
Thu 10/29
10:59 pm-12:18 pm
1 stop10h 19m
$456
PortlandOntario
PWM - ONT
PWMONT
Portland
Fri 7/3
5:20 pm-10:25 pm
1 stop8h 05m
Ontario
Fri 7/10
8:35 am-12:10 am
2 stops12h 35m
$458
PortlandOntario
PWM - ONT
PWMONT
Portland
Mon 11/23
1:35 pm-10:14 pm
1 stop11h 39m
Ontario
Tue 11/24
10:59 pm-12:18 pm
1 stop10h 19m
$487
PortlandOntario
PWM - ONT
PWMONT
Portland
Wed 7/8
5:30 am-12:40 pm
2 stops10h 10m
Ontario
Sat 7/18
9:50 am-11:45 pm
2 stops10h 55m
$507
PortlandOntario
PWM - ONT
PWMONT
Portland
Sat 9/26
11:35 am-10:59 pm
2 stops14h 24m
Ontario
Tue 9/29
6:00 am-11:27 pm
2 stops14h 27m
$508
Quickest round-trip
PortlandOntario
PWM - ONT
PWMONT
Portland
Tue 8/18
4:47 pm-11:34 pm
2 stops9h 47m
Ontario
Mon 9/14
11:59 am-11:25 pm
1 stop8h 26m
$530
Showing 1-10 of 22 resultsSorted by cheapest first
Compare providers for flights from Portland to Ontario
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 Portland to Ontario in June.
| 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 Portland, Maine-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland, Maine-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland, Maine-Ontario flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Portland, Maine-Ontario 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 Portland, Maine-Ontario 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 Portland to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Portland with our price prediction graph.
PWM-ONT
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.
Reviews of airlines servicing Ontario
Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated June 5, 2026.
Read reviews from past customers who have flown American Airlines from Portland to Ontario. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
6.4
Comfort
7.2
Boarding
7.5
Overall
7.1
Crew
7.9
Entertainment
6.9
Reviews
1 / 20
2.0
MediocreAnonymous,Mar 2026
MIA - SFO
Food
6.4
Comfort
7.2
Boarding
7.5
Overall
7.1
Crew
7.9
Entertainment
6.9
Reviews
1 / 20
2.0
MediocreAnonymous,Mar 2026
MIA - SFO
Related info for your journey
Find useful and relevant information for your journey from Portland to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Top airline flying from Portland to Ontario
Discover the top airline that operate flights from Portland to Ontario. 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 June 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$279 | Average$456 | FlexibilityNo cancel fee | On-time71% |