What airlines fly to Ontario?

JetBlue, Delta and American Airlines are the top three most popular airlines that fly to Ontario from Portland, Maine according to our data. JetBlue is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 10 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Portland to Ontario?

American Airlines, Delta, and JetBlue are the most popular carriers operating from Portland to Ontario

When did momondo last update prices for flights from Portland Airport to Ontario Airport?

Prices for flights from Portland Airport to Ontario Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Portland Airport to Ontario Airport?

There are 2 operators available for flights from Portland Airport to Ontario Airport as of July 2025.

How old do you have to be to fly from Portland Airport to Ontario Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Portland Airport to Ontario Airport.

What documentation or ID do you need to fly to Ontario Airport?

The necessary travel and health documents for your Ontario Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$118 Cheap Flights from Portland to Ontario in 2025

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Find the cheapest flights from Portland, Maine to Los Angeles

Round-trip

One-way

Last minute

Cheap round-trip flights

2:17 pm - 9:29 pmPWM-ONT

10h 12m1 stop

10:56 pm - 1:22 pmONT-PWM

11h 26m1 stop

$291JetBlue

Find Deal

Thu, Sep 4 - Tue, Sep 9

11:50 am - 5:15 pmPWM-ONT

8h 25m1 stop

6:40 am - 10:15 pmONT-PWM

12h 35m2 stops

$316Southwest

Find Deal

Thu, Nov 6 - Tue, Nov 11

2:19 pm - 9:59 pmPWM-ONT

10h 40m1 stop

11:59 pm - 1:23 pmONT-PWM

10h 24m1 stop

$350JetBlue

Find Deal

Wed, Aug 20 - Mon, Aug 25

4:51 pm - 10:31 pmPWM-ONT

8h 40m1 stop

5:05 am - 3:48 pmONT-PWM

7h 43m1 stop

$351United Airlines

Find Deal

Sat, Nov 15 - Tue, Nov 18

3:00 pm - 12:05 amPWM-ONT

12h 05m2 stops

6:40 am - 10:15 pmONT-PWM

12h 35m2 stops

$355Southwest

Find Deal

Thu, Nov 6 - Tue, Nov 11

4:54 pm - 10:31 pmPWM-ONT

8h 37m1 stop

5:05 am - 3:48 pmONT-PWM

7h 43m1 stop

$374United Airlines

Find Deal

Thu, Nov 6 - Tue, Nov 11

6:00 am - 4:06 pmPWM-ONT

13h 06m2 stops

8:14 am - 11:44 pmONT-PWM

12h 30m2 stops

$403American Airlines

Find Deal

Fri, Aug 15 - Tue, Aug 19

1:34 pm - 7:11 pmPWM-ONT

8h 37m1 stop

11:45 am - 12:03 amONT-PWM

9h 18m1 stop

$506Delta

Find Deal

Thu, Aug 14 - Mon, Aug 18

1:34 pm - 7:11 pmPWM-ONT

8h 37m1 stop

10:00 pm - 12:08 pmONT-PWM

11h 08m2 stops

$511Delta

Find Deal

Thu, Aug 14 - Mon, Aug 18

9:08 am - 6:25 pmPWM-ONT

12h 17m1 stop

11:29 pm - 1:07 pmONT-PWM

10h 38m1 stop

$521American Airlines

Find Deal

Sun, Aug 31 - Tue, Sep 2

JetBlue flights from Portland, Maine to Ontario

Our best JetBlue deals on Portland, Maine to Ontario flight tickets

JetBlue

Sep 4

PWM2:17 pmPortland

10h 12m

1 stop

ONT9:29 pmOntario

Sep 9

ONT10:56 pmOntario

11h 26m

1 stop

PWM1:22 pmPortland

$291

Find similar

JetBlue

Aug 20

PWM2:19 pmPortland

10h 40m

1 stop

ONT9:59 pmOntario

Aug 25

ONT11:59 pmOntario

10h 24m

1 stop

PWM1:23 pmPortland

$350

Find similar

JetBlue

Aug 14

PWM2:19 pmPortland

10h 51m

1 stop

ONT10:10 pmOntario

Aug 18

ONT11:59 pmOntario

10h 24m

1 stop

PWM1:23 pmPortland

$425

Find similar

Delta flights from Portland, Maine to Ontario

Our best Delta deals on Portland, Maine to Ontario flight tickets

Delta

Aug 14

PWM1:34 pmPortland

8h 37m

1 stop

ONT7:11 pmOntario

Aug 18

ONT11:45 amOntario

9h 18m

1 stop

PWM12:03 amPortland

$506

Find similar

Delta

Aug 14

PWM1:34 pmPortland

8h 37m

1 stop

ONT7:11 pmOntario

Aug 18

ONT10:00 pmOntario

11h 08m

2 stops

PWM12:08 pmPortland

$511

Find similar

Delta

Aug 4

PWM1:07 pmPortland

9h 13m

1 stop

ONT7:20 pmOntario

Aug 8

ONT11:40 amOntario

9h 58m

1 stop

PWM12:38 amPortland

$801

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PortlandOntario

PWM - ONT

PWMONT

Portland

Thu 9/4

2:17 pm-9:29 pm

1 stop10h 12m

Ontario

Tue 9/9

10:56 pm-1:22 pm

1 stop11h 26m

$291

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

Wed 8/20

2:19 pm-9:59 pm

1 stop10h 40m

Ontario

Mon 8/25

11:59 pm-1:23 pm

1 stop10h 24m

$350

PortlandOntario

PWM - ONT

PWMONT

Portland

Sat 11/15

4:51 pm-10:31 pm

1 stop8h 40m

Ontario

Tue 11/18

5:05 am-3:48 pm

1 stop7h 43m

$351

PortlandOntario

PWM - ONT

PWMONT

Portland

Thu 11/6

3:00 pm-12:05 am

2 stops12h 05m

Ontario

Tue 11/11

6:40 am-10:15 pm

2 stops12h 35m

$355

PortlandOntario

PWM - ONT

PWMONT

Portland

Thu 11/6

4:54 pm-10:31 pm

1 stop8h 37m

Ontario

Tue 11/11

5:05 am-3:48 pm

1 stop7h 43m

$374

PortlandOntario

PWM - ONT

PWMONT

Portland

Fri 8/15

6:00 am-4:06 pm

2 stops13h 06m

Ontario

Tue 8/19

8:14 am-11:44 pm

2 stops12h 30m

$403

PortlandOntario

PWM - ONT

PWMONT

Portland

Thu 8/14

1:34 pm-7:11 pm

1 stop8h 37m

Ontario

Mon 8/18

11:45 am-12:03 am

1 stop9h 18m

$506

PortlandOntario

PWM - ONT

PWMONT

Portland

Thu 8/14

1:34 pm-7:11 pm

1 stop8h 37m

Ontario

Mon 8/18

10:00 pm-12:08 pm

2 stops11h 08m

$511

PortlandOntario

PWM - ONT

PWMONT

Portland

Sun 8/31

9:08 am-6:25 pm

1 stop12h 17m

Ontario

Tue 9/2

11:29 pm-1:07 pm

1 stop10h 38m

$521

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Portland, 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

Prices

Airlines

What is the cheapest day to depart on your flight to Ontario?

The cheapest day to depart on your flight to Ontario is on a Saturday when prices can be found for as low as $418. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Portland, Maine to Ontario for around $792.

What is the cheapest time of day to depart on your flight to Ontario?

In the afternoon is the cheapest time of day to fly from Portland, Maine to Ontario when you can find flight prices for as low as $436. Flying to Ontario in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $653 on average. Flights to Ontario from Portland, Maine in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

Can stopping save me money on Portland, Maine to Ontario flights?

You could potentially save up to 37% on your flight if you consider stops on a Portland, Maine to Ontario flight.

When to book flights from Portland, Maine to Ontario

Are you open to changing your travel dates? Check out the ideal times to fly from Portland, Maine to Ontario according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Portland, Maine to Ontario (PWM to ONT) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland, Maine to Ontario

Best Price Found	$118
Fastest flight time	7h 45m
Direct flights	None
Airports in Ontario	1 airport

The best one-way flight to Ontario from Portland, Maine in the past 72 hours is $118. The best round-trip flight deal from Portland, Maine to Ontario found on momondo in the last 72 hours is $291.

The fastest flight from Portland, Maine to Ontario takes 7h 45m

There are no direct flights from Portland, Maine to Ontario. Popular non-direct route for this connection is Portland Airport - Ontario Airport.

There is 1 airport near Ontario: Ontario (ONT)

Search flight deals

How far is Portland to Ontario by plane?
Portland and Ontario are 2595.5 mi apart from one another. Flights usually cover this in 7h 45m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Portland Airport to Ontario Airport?
Prices for flights from Portland Airport to Ontario Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Portland Airport to Ontario Airport?
There are 2 operators available for flights from Portland Airport to Ontario Airport as of July 2025.
How old do you have to be to fly from Portland Airport to Ontario Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Portland Airport to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The necessary travel and health documents for your Ontario Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Portland, Maine to Ontario?
momondo data reveals that the most frequently booked airline on the route from Portland, Maine to Ontario is Delta, representing 54% of all bookings. The subsequent popular airline is American Airlines at 46%.

Best airlines flying from Portland, Maine to Ontario

Compare and see reviews for airlines that fly from Portland, Maine to Ontario with momondo

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom $279	Free Cancellation	Rating 7.2 10,000 reviews		Search American Airlines flights
Delta	PriceFrom $302	Free Cancellation	Rating 8.0 7,981 reviews		Search Delta flights

Why use momondo?

Why should I use momondo to find a flight deal from Portland to Ontario?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Portland to Ontario for you.

Can I find flights from Portland to Ontario with flexible booking policies on momondo?

momondo does allow users to show only those flights to Ontario from Portland which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Portland to Ontario?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Ontario from Portland.

I’m not ready to book a flight from Portland to Ontario right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Portland to Ontario now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Ontario and let you know when they change.