Cheap flights from Maine to Los Angeles from $214
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Maine to Los Angeles departing on 11/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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United Airlines flights from Maine to Ontario
Our best United Airlines deals on Maine to Ontario flight tickets
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Use the filters below to find and compare flights from Maine to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
PortlandOntario
PWM Portland - ONT Ontario
PWMONT
Portland
Sat 11/7
1:10 pm-10:43 pm
2 stops12h 33m
Ontario
Sat 11/14
12:18 pm-11:31 pm
1 stop8h 13m
PortlandOntario
PWM Portland - ONT Ontario
PWMONT
Portland
Sat 11/7
11:55 am-10:43 pm
2 stops13h 48m
Ontario
Sat 11/14
12:18 pm-11:31 pm
1 stop8h 13m
PortlandOntario
PWM Portland - ONT Ontario
PWMONT
Portland
Sat 11/7
11:55 am-10:43 pm
2 stops13h 48m
Ontario
Sat 11/14
7:00 am-11:31 pm
2 stops13h 31m
PortlandOntario
PWM Portland - ONT Ontario
PWMONT
Portland
Mon 1/25
10:52 am-11:13 pm
2 stops15h 21m
Ontario
Sat 1/30
6:00 am-9:43 pm
2 stops12h 43m
PortlandOntario
PWM Portland - ONT Ontario
PWMONT
Portland
Tue 11/10
5:30 am-3:33 pm
2 stops13h 03m
Ontario
Tue 11/17
5:00 am-4:02 pm
1 stop8h 02m
PortlandOntario
PWM Portland - ONT Ontario
PWMONT
Portland
Sat 11/7
1:10 pm-10:43 pm
2 stops12h 33m
Ontario
Sat 11/14
12:18 pm-11:31 pm
1 stop8h 13m
PortlandOntario
PWM Portland - ONT Ontario
PWMONT
Portland
Mon 1/25
10:52 am-11:13 pm
2 stops15h 21m
Ontario
Sat 1/30
6:00 am-9:43 pm
2 stops12h 43m
PortlandOntario
PWM Portland - ONT Ontario
PWMONT
Portland
Mon 1/25
11:49 am-11:13 pm
2 stops14h 24m
Ontario
Sat 1/30
9:28 am-10:48 pm
2 stops10h 20m
PortlandOntario
PWM Portland - ONT Ontario
PWMONT
Portland
Tue 11/10
3:23 pm-8:51 pm
1 stop8h 28m
Ontario
Tue 11/17
5:00 am-4:02 pm
1 stop8h 02m
PortlandOntario
PWM Portland - ONT Ontario
PWMONT
Portland
Thu 10/29
3:23 pm-8:51 pm
1 stop8h 28m
Ontario
Sun 11/1
5:00 am-4:02 pm
1 stop8h 02m
See travel insights to Los Angeles from
How to get the cheapest flight ticket from Maine to Ontario
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Ontario?
In general, November is the cheapest month to fly from Maine to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. If you aren’t able to travel during the month of November, then book flights to Ontario from Maine during January instead. Flights to Ontario in January, while not as cheap as those in November, still average around $0.
Can stopping save me money on Maine to Ontario flights?
You could potentially save up to 32% on your flight if you consider stops on a Maine to Ontario flight.
What is the cheapest airline that flies from Maine to Ontario?
United Airlines and Southwest are the most popular carriers operating from Maine to Ontario
What airlines fly to Ontario?
American Airlines, United Airlines and Delta are the top three most popular airlines that fly to Ontario from Maine according to our data. American Airlines is the first choice among our users, with 49% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 4 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.
Cheap Maine to Ontario flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Maine to Ontario
Frequently asked questions about flying from Maine to Ontario
When did momondo last update prices for flights from Maine to Ontario Airport?
Prices for flights from Maine to Ontario Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Maine to Ontario Airport?
As of October 2026, there are 2 operators available to choose from for flights from Maine to Ontario Airport.
How old do you have to be to fly from Maine to Ontario Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Maine to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The travel and health documents you'll need for your trip to Ontario Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ontario Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
Best airlines flying from Maine to Ontario
Compare and see reviews for airlines that fly from Maine to Ontario with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $302 | Free Cancellation | Rating 7.8 8,653 reviews | |||
| PriceFrom $360 | Free Cancellation | Rating 7.0 12,142 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Maine to Ontario?
It is quick and easy to find Maine to Ontario flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Ontario that suits you.
Can I find flights from Maine to Ontario with flexible booking policies on momondo?
Flights from Maine to Ontario with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from Maine to Ontario?
momondo helps you find the best flight between Maine and Ontario by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.
I’m not ready to book a flight from Maine to Ontario right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to Ontario from Maine. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.