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$107 Find Cheap Flights from Maine to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Ontario departing on 1/27. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags

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Good to know

Low season

January

High season

October

Cheapest flight

$107
Best time to beat the crowds with an average 1% drop in price.
Most popular time to fly and prices are also 1% lower on average.
Flight from Boston to Ontario

FAQs for booking flights from Maine to Ontario

  • How does KAYAK find such low prices on flights from Maine to Ontario?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Maine to Ontario.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Maine to Ontario?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Maine is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Maine to Ontario?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back to Maine with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Maine to Ontario?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario from Maine up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Prefer to fly non-stop from Maine to Ontario?

Find which airlines fly direct from Maine to Ontario Airport, which days they fly and book direct flights.

Nonstop departures

Maine to Ontario

Monday

Aeromexico, Air Canada, Air France, +20 more

Aeromexico, Air Canada, +21 more

Tuesday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

Wednesday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

Thursday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

Friday

Aeromexico, Air Canada, Air France, +20 more

Aeromexico, Air Canada, +21 more

Saturday

Aeromexico, Air Canada, Air France, +21 more

Aeromexico, Air Canada, +22 more

Sunday

Aeromexico, Air Canada, Air France, +21 more

Aeromexico, Air Canada, +22 more

See more direct flights

Nonstop returns

Ontario to Maine

Monday

Aeromexico, Air Canada, Air France, +20 more

Aeromexico, Air Canada, +21 more

Tuesday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

Wednesday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

Thursday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

Friday

Aeromexico, Air Canada, Air France, +20 more

Aeromexico, Air Canada, +21 more

Saturday

Aeromexico, Air Canada, Air France, +21 more

Aeromexico, Air Canada, +22 more

Sunday

Aeromexico, Air Canada, Air France, +21 more

Aeromexico, Air Canada, +22 more

See more direct flights
See more direct flights

Book cheap flights from Maine to Ontario

Recent round-trip flight deals

12/6Fri
1 stopAlaska Airlines
28h 10mBOS-ONT
12/8Sun
1 stopAlaska Airlines
30h 13mONT-BOS
$302
1/7Tue
1 stopDelta
18h 30mBOS-ONT
1/13Mon
1 stopDelta
21h 45mONT-BOS
$303
1/10Fri
1 stopAlaska Airlines
19h 54mBOS-ONT
1/13Mon
1 stopAlaska Airlines
9h 26mONT-BOS
$305
12/5Thu
1 stopAmerican Airlines
8h 05mBOS-ONT
12/9Mon
1 stopAmerican Airlines
7h 44mONT-BOS
$308
12/5Thu
1 stopAmerican Airlines
8h 05mBOS-ONT
12/11Wed
2 stopsAmerican Airlines
10h 10mONT-BOS
$313
1/29Wed
2 stopsSouthwest
11h 15mBOS-ONT
2/3Mon
2 stopsSouthwest
9h 20mONT-BOS
$348
11/22Fri
1 stop
15h 13mBOS-ONT
11/24Sun
1 stop
15h 59mONT-BOS
$411
12/12Thu
2 stopsUnited Airlines
16h 13mBOS-ONT
12/15Sun
1 stopUnited Airlines
10h 33mONT-BOS
$413
1/10Fri
2 stopsUnited Airlines
11h 58mBOS-ONT
1/13Mon
2 stopsUnited Airlines
15h 08mONT-BOS
$418
12/12Thu
2 stopsSouthwest
10h 00mBOS-ONT
12/17Tue
2 stopsSouthwest
9h 10mONT-BOS
$425

Search by stops

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Recent one-way flight deals

1/27Mon
2 stopsFrontier
13h 46mBOS-ONT
$107
11/21Thu
1 stopFrontier
13h 57mBOS-ONT
$139
12/11Wed
1 stopDelta
12h 54mBOS-ONT
$152
12/17Tue
1 stopAmerican Airlines
10h 30mBOS-ONT
$154
12/16Mon
1 stopDelta
8h 49mBOS-ONT
$155
12/7Sat
1 stopAlaska Airlines
17h 04mBOS-ONT
$157
11/4Mon
2 stops
21h 12mBOS-ONT
$158
12/6Fri
1 stopAlaska Airlines
19h 59mBOS-ONT
$162
12/18Wed
1 stopAmerican Airlines
8h 45mBOS-ONT
$258
12/28Sat
2 stops
23h 20mBOS-ONT
$364

Search by stops

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Search by price

Last minute flights from Maine to Ontario

Last minute flight, train and bus deals

11/5Tue
multi-stopAlaska Airlines
11h 20mBOS-ONT
11/17Sun
multi-stopAlaska Airlines
9h 59mONT-BOS
$450
11/5Tue
multi-stopAlaska Airlines
11h 20mBOS-ONT
11/19Tue
multi-stopAlaska Airlines
9h 30mONT-BOS
$521
11/5Tue
multi-stopAlaska Airlines
15h 10mBOS-ONT
11/17Sun
multi-stopAlaska Airlines
9h 59mONT-BOS
$529
11/1Fri
multi-stopAlaska Airlines
9h 34mBOS-ONT
11/15Fri
multi-stopAlaska Airlines
9h 59mONT-BOS
$551
11/1Fri
multi-stopAmerican Airlines
8h 02mBOS-ONT
11/7Thu
multi-stopAmerican Airlines
6h 42mONT-BOS
$667
11/2Sat
multi-stopAmerican Airlines
10h 20mBOS-ONT
11/2Sat
multi-stopAmerican Airlines
8h 58mONT-BOS
$741
11/2Sat
multi-stopSouthwest
12h 20mBOS-ONT
11/3Sun
multi-stopSouthwest
9h 35mONT-BOS
$746
11/1Fri
multi-stopSouthwest
11h 10mBOS-ONT
11/3Sun
multi-stopSouthwest
9h 00mONT-BOS
$776
11/5Tue
multi-stopUnited Airlines
9h 32mBOS-ONT
11/8Fri
multi-stopUnited Airlines
15h 34mONT-BOS
$1,249
11/2Sat
multi-stopUnited Airlines
8h 28mBOS-ONT
11/5Tue
multi-stopUnited Airlines
6h 57mONT-BOS
$1,350

Search by stops

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Everything you need to know for your flight to Ontario

Information on the airport you'll fly into in Ontario