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Ontario

$126+ 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 8/26. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — ONT
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
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Cheap flight deals from Maine to Ontario

Keep the following information in mind while searching for Maine to Ontario flight deals. Data was last updated July 31, 2025.

Round-trip from

$256
(Rumbo)

One-way from

$126
(American Airlines)

Popular in

August

Cheapest in

January

Average price

$463
From Maine to Ontario
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One-way flight from Maine to Ontario
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Highest demand for flights based on searches. 5% potential increase in price ($23 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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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 July 31, 2025.

This Rumbo deal was found by Cheapflights users on 7/30. 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 Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/302:40 pmBOS - ONT
1 stop10h 19mJetBlue
Fri 9/510:56 pmONT - BOS
1 stop7h 38mJetBlue
Deal found 7/30$256
This American Airlines deal was found by Cheapflights users on 7/29. 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.
Sat 8/237:15 amBOS - ONT
1 stop9h 24mAmerican Airlines
Sat 8/3012:22 pmONT - BOS
1 stop8h 26mAmerican Airlines
Deal found 7/29$263
This United Airlines deal was found by Cheapflights users on 7/29. 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 8/267:30 amBOS - ONT
1 stop8h 02mUnited Airlines
Tue 9/27:00 amONT - BOS
1 stop7h 46mUnited Airlines
Deal found 7/29$277
This Hawaiian Airlines deal was found by Cheapflights users on 7/29. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/247:20 amBOS - ONT
1 stop9h 52mHawaiian Airlines
Mon 9/297:47 pmONT - BOS
1 stop9h 13mHawaiian Airlines
Deal found 7/29$284
This JetBlue deal was found by Cheapflights users on 7/31. 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.
Tue 9/302:17 pmPWM - ONT
1 stop10h 12mJetBlue
Mon 10/610:56 pmONT - PWM
1 stop11h 26mJetBlue
Deal found 7/31$291
This Southwest deal was found by Cheapflights users on 7/30. 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 12/46:45 amBOS - ONT
1 stop10h 45mSouthwest
Mon 12/811:15 amONT - BOS
1 stop8h 30mSouthwest
Deal found 7/30$293
This Alaska Airlines deal was found by Cheapflights users on 7/29. 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.
Tue 9/97:20 amBOS - ONT
1 stop9h 52mAlaska Airlines
Wed 9/1711:39 amONT - BOS
1 stop9h 48mAlaska Airlines
Deal found 7/29$294
This Delta deal was found by Cheapflights users on 7/30. 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 9/25:35 amBOS - ONT
1 stop8h 00mDelta
Tue 9/97:05 amONT - BOS
1 stop8h 26mDelta
Deal found 7/30$296
This United Airlines deal was found by Cheapflights users on 7/31. 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.
Fri 8/294:56 pmPWM - ONT
1 stop8h 34mUnited Airlines
Fri 9/57:00 amONT - PWM
1 stop7h 42mUnited Airlines
Deal found 7/31$297
This Southwest deal was found by Cheapflights users on 7/30. 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 11/611:50 amPWM - ONT
1 stop8h 25mSouthwest
Tue 11/116:40 amONT - PWM
2 stops12h 35mSouthwest
Deal found 7/30$316
This American Airlines deal was found by Cheapflights users on 7/31. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2912:14 pmPWM - ONT
2 stops12h 25mAmerican Airlines
Fri 9/56:10 amONT - PWM
2 stops11h 01mAmerican Airlines
Deal found 7/31$377
This United Airlines deal was found by Cheapflights users on 7/29. 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 9/34:14 pmBGR - ONT
1 stop9h 16mUnited Airlines
Mon 9/87:00 amONT - BGR
2 stops13h 44mUnited Airlines
Deal found 7/29$414

Cheapflights Fare Finder

 
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 July 31, 2025.
Use the filters below to find and compare flights from Maine to Ontario that are best for you.

Fly from

Maine

Fly to

Ontario

Route

Depart

Return

Price

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Sat 8/30

2:40 pm-9:59 pm

1 stop10h 19m

Ontario

Fri 9/5

10:56 pm-9:34 am

1 stop7h 38m

$256

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Sat 8/23

7:15 am-1:39 pm

1 stop9h 24m

Ontario

Sat 8/30

12:22 pm-11:48 pm

1 stop8h 26m

$263

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Tue 8/26

7:30 am-12:32 pm

1 stop8h 02m

Ontario

Tue 9/2

7:00 am-5:46 pm

1 stop7h 46m

$277

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Wed 9/24

7:20 am-2:12 pm

1 stop9h 52m

Ontario

Mon 9/29

7:47 pm-8:00 am

1 stop9h 13m

$284

PortlandOntario

PWM - ONT

PWMONT

Portland

Tue 9/30

2:17 pm-9:29 pm

1 stop10h 12m

Ontario

Mon 10/6

10:56 pm-1:22 pm

1 stop11h 26m

$291

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Tue 9/9

7:20 am-2:12 pm

1 stop9h 52m

Ontario

Wed 9/17

11:39 am-12:27 am

1 stop9h 48m

$294

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

Tue 9/2

5:35 am-10:35 am

1 stop8h 00m

Ontario

Tue 9/9

7:05 am-6:31 pm

1 stop8h 26m

$296

PortlandOntario

PWM - ONT

PWMONT

Portland

Fri 8/29

4:56 pm-10:30 pm

1 stop8h 34m

Ontario

Fri 9/5

7:00 am-5:42 pm

1 stop7h 42m

$297

PortlandOntario

PWM - ONT

PWMONT

Portland

Thu 11/6

11:50 am-5:15 pm

1 stop8h 25m

Ontario

Tue 11/11

6:40 am-10:15 pm

2 stops12h 35m

$316

PortlandOntario

PWM - ONT

PWMONT

Portland

Fri 8/29

12:14 pm-9:39 pm

2 stops12h 25m

Ontario

Fri 9/5

6:10 am-8:11 pm

2 stops11h 01m

$377

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 28 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.

Cheapflights Insights

Everything you need to know about your flight from Maine to Ontario

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 $328). 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.

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 July 31, 2025.
Read through reviews of airlines operating flights from Maine to Ontario, such as Alaska Airlines, Southwest, and Delta. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,246 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,981 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.8
Good
2,611 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,900 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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?

    $126 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on Delta and Southwest, with prices starting from $149 and $149, 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 $328). 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

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Alternative routes for Maine to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Maine to Ontario

Discover the top 2 airlines 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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$279Average$513FlexibilityNo cancel feeOn-time71%
DeltaCheapest$302Average$442FlexibilityNo cancel feeOn-timeN/A

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