HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$93+ Cheap flights from Maine to Ontario (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 2/4. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — ONT
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Maine 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
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 Maine to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Maine (USME) 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 January 21, 2025.

Round-trip from

$180
(Frontier)

One-way from

$93
(Trip.com)
From Maine to Ontario
Search Deals
One-way flight from Maine to Ontario
Search Deals

Find flight deals from Maine to Ontario

Cheapest flights from Maine to Ontario
Explore the most affordable flight options available from Maine to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2025.

This Frontier deal was found by Cheapflights users on 1/20. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/126:00 amBOS - ONT
1 stop14h 59mFrontier
Tue 4/16:59 pmONT - BOS
1 stop13h 56mFrontier
Deal found 1/20$180
This American Airlines deal was found by Cheapflights users on 1/20. 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 2/196:17 amBOS - ONT
1 stop8h 50mAmerican Airlines
Wed 2/2610:50 pmONT - BOS
1 stop9h 08mAmerican Airlines
Deal found 1/20$289
This United Airlines deal was found by Cheapflights users on 1/20. 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 2/1211:00 amBOS - ONT
1 stop10h 04mUnited Airlines
Sun 2/165:05 amONT - BOS
2 stops11h 10mUnited Airlines
Deal found 1/20$304
This Delta deal was found by Cheapflights users on 1/20. 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.
Wed 2/193:50 pmBOS - ONT
1 stop10h 02mDelta
Tue 2/254:05 pmONT - BOS
1 stop11h 50mDelta
Deal found 1/20$309
This Alaska Airlines deal was found by Cheapflights users on 1/20. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/267:00 amBOS - ONT
1 stop17h 27mAlaska Airlines
Thu 3/611:57 amONT - BOS
1 stop9h 02mAlaska Airlines
Deal found 1/20$325
This Delta deal was found by Cheapflights users on 1/20. 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 8/1912:30 pmPWM - ONT
1 stop9h 59mDelta
Sun 8/2410:59 pmONT - PWM
1 stop9h 40mDelta
Deal found 1/20$333
This American Airlines deal was found by Cheapflights users on 1/20. 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.
Thu 2/612:48 pmPWM - ONT
2 stops14h 10mAmerican Airlines
Thu 2/136:13 amONT - PWM
2 stops13h 28mAmerican Airlines
Deal found 1/20$425
This JetBlue Airways deal was found by Cheapflights users on 1/21. 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 Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/303:20 pmPWM - ONT
1 stop9h 02mJetBlue
Fri 6/610:40 pmONT - PWM
1 stop11h 40mJetBlue
Deal found 1/21$525
This United Airlines deal was found by Cheapflights users on 1/21. 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 2/207:30 amBGR - ONT
2 stops16h 10mUnited Airlines
Tue 2/257:40 pmONT - BGR
2 stops12h 23mUnited Airlines
Deal found 1/21$574
This United Airlines deal was found by Cheapflights users on 1/19. 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 2/226:01 amPWM - ONT
2 stops11h 29mUnited Airlines
Tue 2/257:40 pmONT - PWM
2 stops12h 22mUnited Airlines
Deal found 1/19$599
This Delta deal was found by Cheapflights users on 1/20. 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 1/273:00 pmBGR - ONT
2 stops11h 53mDelta
Wed 1/297:05 amONT - BGR
2 stops13h 14mDelta
Deal found 1/20$789
This American Airlines deal was found by Cheapflights users on 1/20. 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 4/211:01 pmBGR - ONT
2 stops11h 58mAmerican Airlines
Sat 4/2611:59 pmONT - BGR
2 stops12h 21mAmerican Airlines
Deal found 1/20$918

Find flights from Maine to Ontario within your budget

Customize your flight search to find flights from Maine 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 January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 3/12

6:00 am-5:59 pm

1 stop14h 59m

Ontario

Tue 4/1

6:59 pm-11:55 am

1 stop13h 56m

$180

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 2/19

6:17 am-12:07 pm

1 stop8h 50m

Ontario

Wed 2/26

10:50 pm-10:58 am

1 stop9h 08m

$289

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 2/12

11:00 am-6:04 pm

1 stop10h 04m

Ontario

Sun 2/16

5:05 am-7:15 pm

2 stops11h 10m

$304

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 2/19

3:50 pm-10:52 pm

1 stop10h 02m

Ontario

Tue 2/25

4:05 pm-6:55 am

1 stop11h 50m

$309

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 2/26

7:00 am-9:27 pm

1 stop17h 27m

Ontario

Thu 3/6

11:57 am-11:59 pm

1 stop9h 02m

$325

PortlandOntario

PWM - ONT

PWMONT

Portland

Thu 2/6

5:34 am-11:50 am

1 stop9h 16m

Ontario

Thu 2/13

1:05 pm-11:55 pm

1 stop7h 50m

$355

PortlandOntario

PWM - ONT

PWMONT

Portland

Thu 2/6

12:48 pm-11:58 pm

2 stops14h 10m

Ontario

Thu 2/13

6:13 am-10:41 pm

2 stops13h 28m

$425

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Mon 4/21

12:55 pm-6:58 pm

1 stop9h 03m

Ontario

Fri 4/25

6:24 pm-7:55 am

1 stop10h 31m

$521

PortlandOntario

PWM - ONT

PWMONT

Portland

Fri 5/30

3:20 pm-9:22 pm

1 stop9h 02m

Ontario

Fri 6/6

10:40 pm-1:20 pm

1 stop11h 40m

$525

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Mon 4/21

5:50 am-11:05 am

1 stop8h 15m

Ontario

Fri 4/25

7:35 pm-8:15 am

2 stops9h 40m

$552

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 30 results
1
2
3

Best time to book a flight from Maine to Ontario

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

Travel insights for flights from Maine to Ontario

Get recent, data-driven insights about flights from Maine to Ontario including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Maine to Ontario?

Currently, August is the cheapest month in which you can book a flight from Maine to Ontario (average of $246). Flying from Maine to Ontario in March is currently the most expensive (average of $310). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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 January 21, 2025.
Read through reviews of airlines operating flights from Maine to Ontario, such as American Airlines, United Airlines and Alaska Airlines. 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.
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Boarding

8.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Southwest
8.1
Very good
4,662 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Boarding

8.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Alaska Airlines
8.0
Very good
9,706 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Boarding

8.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Delta
8.0
Very good
8,521 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Boarding

8.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

JetBlue
7.4
Good
3,201 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Boarding

8.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

United Airlines
7.4
Good
8,985 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Boarding

8.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Related info for your journey

Find useful and relevant information for your journey from Maine to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Ontario from Maine?

    If you book a flight to Ontario from Maine, you will be flying to Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario.

  • What are the cheapest airlines to fly from Maine to Ontario one-way?

    $93 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on JetBlue and Delta, with prices starting from $136 and $155, respectively.

  • What are the most popular routes from Maine to Ontario?

    The most popular route from Maine to Ontario is Boston Logan Intl - Ontario. You may also consider Portland - Ontario or Bangor - Ontario.

  • Can I find deals for flights from Maine to Ontario that include hotel bookings?

    Yes. In addition to deals on Maine to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Maine to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Maine to Ontario.

  • Can I find deals for business class flights from Maine to Ontario?

    Yes. Cheapflights offers flight deals from Maine to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Maine to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Maine to Ontario (average of $246). Flying from Maine to Ontario in March is currently the most expensive (average of $310). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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.

Alternative routes for Maine to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Las Vegas flights
John F Kennedy Intl to Los Angeles flights
Newark to Los Angeles flights
O'Hare Intl to Las Vegas flights
Dallas/Fort Worth to Las Vegas flights
John F Kennedy Intl to San Francisco flights
Minneapolis to Las Vegas flights
Denver to Las Vegas flights
Seattle to Las Vegas flights
San Francisco to Las Vegas flights
Seattle to Los Angeles flights
Newark to Las Vegas flights
Dallas/Fort Worth to Los Angeles flights
Dulles Intl to Las Vegas flights
Newark to San Francisco flights
Atlanta to Las Vegas flights
Los Angeles to Las Vegas flights
Boston to Las Vegas flights
O'Hare Intl to Los Angeles flights
Reagan-National to Los Angeles flights
LaGuardia to Las Vegas flights
LaGuardia to Los Angeles flights
Seattle to San Diego flights
Detroit to Las Vegas flights
Santa Ana to Las Vegas flights
Seattle to Santa Ana flights
Dulles Intl to Los Angeles flights
Baltimore to Las Vegas flights
Boston to Los Angeles flights
Seattle to Ontario flights
Baltimore to Los Angeles flights
Burbank to Las Vegas flights
Reagan-National to Las Vegas flights
Midway to Las Vegas flights
Seattle to San Francisco flights
Hobby to Las Vegas flights
San Francisco to Los Angeles flights
Los Angeles to San Francisco flights
San Jose to Las Vegas flights
O'Hare Intl to San Francisco flights
Philadelphia to Las Vegas flights
George Bush Intcntl to Las Vegas flights
Orlando to Las Vegas flights
Hobby to Los Angeles flights
Oakland to Las Vegas flights
Portland to Los Angeles flights
LaGuardia to San Francisco flights
Salt Lake City to Los Angeles flights
Austin to Las Vegas flights
Reagan-National to San Francisco flights

Top airline flying from Maine to Ontario

Discover the top airline that operate flights from Maine 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 January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$352Average$592FlexibilityNo cancel feeOn-time71%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.