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Ontario

$100+ 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 6/30. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — ONT
jun. 21 — jun. 281
sáb. 6/21
sáb. 6/28
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 junio 16, 2025.

Round-trip from

$256
(Alaska Airlines)

One-way from

$100
(Frontier)

Popular in

August

Cheapest in

January

Average price

$419
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. 4% potential increase in price ($20 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in June 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 junio 16, 2025.

This Alaska Airlines deal was found by Cheapflights users on 6/15. 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.
lun. 6/309:20 amBOS - ONT
1 stop11h 44mAlaska Airlines
vie. 7/412:00 pmONT - BOS
1 stop8h 59mAlaska Airlines
Deal found 6/15$256
This American Airlines deal was found by Cheapflights users on 6/14. 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.
vie. 9/51:57 pmPWM - ONT
1 stop10h 27mAmerican Airlines
sáb. 9/136:10 amONT - PWM
1 stop8h 35mAmerican Airlines
Deal found 6/14$274
This Frontier deal was found by Cheapflights users on 6/14. 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.
lun. 6/3011:56 amBOS - ONT
1 stop10h 18mFrontier
jue. 7/178:09 pmONT - BOS
1 stop11h 48mFrontier
Deal found 6/14$280
This United Airlines deal was found by Cheapflights users on 6/14. 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.
vie. 7/47:30 amBOS - ONT
1 stop8h 02mUnited Airlines
lun. 7/141:34 pmONT - BOS
1 stop7h 21mUnited Airlines
Deal found 6/14$285
This JetBlue deal was found by Cheapflights users on 6/13. 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.
mié. 7/161:59 pmBOS - ONT
1 stop11h 00mJetBlue
lun. 7/2111:59 pmONT - BOS
1 stop9h 16mJetBlue
Deal found 6/13$291
This JetBlue deal was found by Cheapflights users on 6/16. 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.
mar. 7/152:19 pmPWM - ONT
1 stop10h 40mJetBlue
mar. 7/2211:59 pmONT - PWM
1 stop10h 24mJetBlue
Deal found 6/16$291
This Delta deal was found by Cheapflights users on 6/15. 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.
mié. 7/26:00 amBOS - ONT
1 stop9h 17mDelta
mar. 7/151:15 pmONT - BOS
1 stop8h 09mDelta
Deal found 6/15$305
This Delta deal was found by Cheapflights users on 6/14. 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.
vie. 9/51:34 pmPWM - ONT
2 stops12h 06mDelta
sáb. 9/137:00 amONT - PWM
2 stops13h 31mDelta
Deal found 6/14$307
This American Airlines deal was found by Cheapflights users on 6/14. 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.
mar. 8/126:15 amBOS - ONT
1 stop13h 09mAmerican Airlines
mié. 8/206:17 amONT - BOS
1 stop11h 36mAmerican Airlines
Deal found 6/14$311
This Kissandfly.com deal was found by Cheapflights users on 6/14. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 7/411:56 amBOS - ONT
1 stop10h 18mMultiple Airlines
sáb. 7/126:10 pmONT - BOS
1 stop8h 50mMultiple Airlines
Deal found 6/14$333
This Southwest deal was found by Cheapflights users on 6/14. 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.
jue. 7/38:40 amBOS - ONT
1 stop9h 05mSouthwest
dom. 7/69:20 pmONT - BOS
1 stop9h 40mSouthwest
Deal found 6/14$336
This Southwest deal was found by Cheapflights users on 6/15. 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.
mié. 10/155:45 amPWM - ONT
1 stop15h 00mSouthwest
mié. 10/226:30 amONT - PWM
2 stops10h 25mSouthwest
Deal found 6/15$349

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 junio 16, 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

lun. 6/30

9:20 am-6:04 pm

1 stop11h 44m

Ontario

vie. 7/4

12:00 pm-11:59 pm

1 stop8h 59m

$256

PortlandOntario

PWM - ONT

PWMONT

Portland

vie. 9/5

1:57 pm-9:24 pm

1 stop10h 27m

Ontario

sáb. 9/13

6:10 am-5:45 pm

1 stop8h 35m

$274

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

lun. 6/30

11:56 am-7:14 pm

1 stop10h 18m

Ontario

jue. 7/17

8:09 pm-10:57 am

1 stop11h 48m

$280

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

lun. 6/30

5:50 am-5:40 pm

1 stop14h 50m

Ontario

lun. 6/30

9:20 pm-9:50 am

1 stop9h 30m

$282

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

vie. 7/4

7:30 am-12:32 pm

1 stop8h 02m

Ontario

lun. 7/14

1:34 pm-11:55 pm

1 stop7h 21m

$285

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

mié. 7/16

1:59 pm-9:59 pm

1 stop11h 00m

Ontario

dom. 7/20

11:59 pm-12:15 pm

1 stop9h 16m

$291

PortlandOntario

PWM - ONT

PWMONT

Portland

mar. 7/15

2:19 pm-9:59 pm

1 stop10h 40m

Ontario

mar. 7/22

11:59 pm-1:23 pm

1 stop10h 24m

$291

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

mié. 7/2

6:00 am-12:17 pm

1 stop9h 17m

Ontario

lun. 7/14

10:05 pm-9:34 am

1 stop8h 29m

$305

PortlandOntario

PWM - ONT

PWMONT

Portland

vie. 9/5

1:34 pm-10:40 pm

2 stops12h 06m

Ontario

sáb. 9/13

7:00 am-11:31 pm

2 stops13h 31m

$307

BostonOntario

BOS - ONT

BOSONT

Boston Logan Intl

mar. 8/12

6:15 am-4:24 pm

1 stop13h 09m

Ontario

mié. 8/20

6:17 am-8:53 pm

1 stop11h 36m

$311

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/14

Showing 1-10 of 33 results
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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.

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 junio 16, 2025.
Read through reviews of airlines operating flights from Maine to Ontario, such as Alaska Airlines, Southwest and Delta. 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.1

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

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.1

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
4,278 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.1

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
7,963 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,500 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.1

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
8,801 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.1

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?

    $100 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on American Airlines and Delta, with prices starting from $129 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 junio 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$302Average$442FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$332Average$526FlexibilityNo cancel feeOn-time71%

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