What airlines fly to Maryland?

Southwest, United Airlines and Spirit Airlines are the top three most popular airlines that fly to Maryland from Ontario according to our data. Southwest is the first choice among our users, with 35% of people opting to fly with this airline when traveling to Maryland. Keep in mind that there are 8 different airlines that fly to Maryland on a routine basis, so you have a few additional options to choose from.

How many flights depart from Ontario to Maryland on average per week?

7 flights are operational weekly from Ontario to Maryland as of March 2026. The most popular departure day for this route is Mon, with 14% of flights per week taking off on this day.

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

United Airlines, Alaska Airlines, and Delta are the most popular carriers operating from Ontario to Maryland

How many flights depart from Ontario to Maryland on average per day?

The number of flights available between Ontario and Maryland is 1 per day as of March 2026. The most frequent departure time is 9:00PM, with 100% of daily flights leaving in the evening.

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

Prices for flights from Ontario Airport to Maryland were last updated today.

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

As of March 2026, there are 6 operators available to choose from for flights from Ontario Airport to Maryland.

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

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 Ontario Airport to Maryland.

What documentation or ID do you need to fly to Maryland?

The travel and health documents required for your trip to Maryland can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Maryland. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$79 Cheap Flights from Ontario to Maryland in 2026

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Find the cheapest flights from Ontario to Maryland

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:33 pm - 5:34 am

ONT

PHL

9h 01m

1 stop

8:00 am - 6:49 pm

PHL

ONT

13h 49m

1 stop

$160Frontier

Fri, Apr 17 - Wed, Apr 22

8:26 am - 8:15 pm

ONT

BWI

8h 49m

1 stop

4:34 pm - 10:37 pm

BWI

ONT

9h 03m

1 stop

$160Frontier

Fri, Apr 17 - Sat, Apr 25

12:59 am - 1:00 pm

ONT

DCA

9h 01m

1 stop

1:59 pm - 11:55 pm

DCA

ONT

12h 56m

1 stop

$160Frontier

Fri, Apr 24 - Tue, Apr 28

5:33 pm - 5:34 am

ONT

PHL

9h 01m

1 stop

3:27 pm - 11:56 pm

PHL

ONT

11h 29m

1 stop

$161Frontier

Fri, Apr 17 - Sun, Apr 19

12:59 am - 5:35 am

ONT

PHL

25h 36m

1 stop

8:41 pm - 7:26 am

PHL

ONT

13h 45m

1 stop

$162Frontier

Fri, Apr 24 - Sat, May 2

12:59 am - 9:59 pm

ONT

DCA

18h 00m

1 stop

8:00 am - 11:55 pm

DCA

ONT

18h 55m

1 stop

$162Frontier

Wed, Apr 15 - Sat, Apr 18

5:33 pm - 1:00 pm

ONT

DCA

16h 27m

1 stop

6:00 pm - 11:55 pm

DCA

ONT

8h 55m

1 stop

$166Frontier

Fri, Apr 24 - Sat, May 2

7:44 pm - 6:50 am

ONT

PHL

8h 06m

1 stop

8:36 pm - 11:55 pm

PHL

ONT

30h 19m

1 stop

$167Frontier

Tue, Apr 21 - Tue, Apr 28

12:59 am - 1:00 pm

ONT

DCA

9h 01m

1 stop

8:00 am - 10:05 am

DCA

ONT

29h 05m

1 stop

$167Frontier

Wed, Apr 29 - Mon, May 4

11:44 am - 5:13 am

ONT

PHL

14h 29m

1 stop

8:41 pm - 7:26 am

PHL

ONT

13h 45m

1 stop

$171Frontier

Wed, Apr 22 - Sat, May 2

Southwest flights from Ontario to Maryland

Our best Southwest deals on Ontario to Maryland flight tickets

Southwest

Mar 30

ONT6:30 pmOntario

8h 15m

1 stop

BWI5:45 amBaltimore/Washington

Apr 4

BWI5:40 pmBaltimore/Washington

9h 45m

1 stop

ONT12:25 amOntario

$451

Southwest

Mar 30

ONT11:55 pmOntario

6h 30m

1 stop

BWI9:25 amBaltimore/Washington

Apr 4

BWI10:00 pmBaltimore/Washington

13h 50m

2 stops

ONT8:50 amOntario

$462

Southwest

Apr 7

ONT6:30 amOntario

7h 35m

1 stop

BWI5:05 pmBaltimore/Washington

Apr 11

BWI6:50 amBaltimore/Washington

13h 45m

1 stop

ONT5:35 pmOntario

$474

Frontier flights from Ontario to Maryland

Our best Frontier deals on Ontario to Maryland flight tickets

Frontier

Apr 17

ONT5:33 pmOntario

9h 01m

1 stop

PHL5:34 amPhiladelphia

Apr 22

PHL8:00 amPhiladelphia

13h 49m

1 stop

ONT6:49 pmOntario

$160

Frontier

Apr 17

ONT5:33 pmOntario

9h 01m

1 stop

PHL5:34 amPhiladelphia

Apr 19

PHL3:27 pmPhiladelphia

11h 29m

1 stop

ONT11:56 pmOntario

$161

Frontier

Apr 24

ONT12:59 amOntario

25h 36m

1 stop

PHL5:35 amPhiladelphia

May 2

PHL8:41 pmPhiladelphia

13h 45m

1 stop

ONT7:26 amOntario

$162

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Fri 4/17

5:33 pm-5:34 am

1 stop9h 01m

Philadelphia

Wed 4/22

8:00 am-6:49 pm

1 stop13h 49m

$160

Quickest round-trip

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Fri 4/17

8:26 am-8:15 pm

1 stop8h 49m

Baltimore/Washington

Sat 4/25

4:34 pm-10:37 pm

1 stop9h 03m

$160

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Fri 4/24

12:59 am-1:00 pm

1 stop9h 01m

Washington, D.C. Reagan-National

Tue 4/28

1:59 pm-11:55 pm

1 stop12h 56m

$160

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Fri 4/17

5:33 pm-5:34 am

1 stop9h 01m

Philadelphia

Sun 4/19

3:27 pm-11:56 pm

1 stop11h 29m

$161

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Fri 4/24

12:59 am-5:35 am

1 stop25h 36m

Philadelphia

Sat 5/2

8:41 pm-7:26 am

1 stop13h 45m

$162

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Wed 4/15

12:59 am-9:59 pm

1 stop18h 00m

Washington, D.C. Reagan-National

Sat 4/18

8:00 am-11:55 pm

1 stop18h 55m

$162

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Fri 4/24

5:33 pm-1:00 pm

1 stop16h 27m

Washington, D.C. Reagan-National

Sat 5/2

6:00 pm-11:55 pm

1 stop8h 55m

$166

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Tue 4/21

7:44 pm-6:50 am

1 stop8h 06m

Philadelphia

Tue 4/28

8:36 pm-11:55 pm

1 stop30h 19m

$167

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Wed 4/29

12:59 am-1:00 pm

1 stop9h 01m

Washington, D.C. Reagan-National

Mon 5/4

8:00 am-10:05 am

1 stop29h 05m

$167

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Wed 4/22

11:44 am-5:13 am

1 stop14h 29m

Philadelphia

Sat 5/2

8:41 pm-7:26 am

1 stop13h 45m

$171

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 Ontario to Maryland

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

Other information

What is the cheapest month to fly to Maryland?

The cheapest month to fly to Maryland from Ontario is in January. Flight prices, which tend to average around $223, are often lower during this time because this is during the off-season. If you don’t want to visit Maryland in January, then you should wait until September to fly from Ontario, when ticket prices are also cheap, with an average price of $226.

What is the cheapest Ontario to Maryland flight route?

Fly from Ontario to Baltimore/Washington for the best Ontario - Maryland flight prices

What cabin class options are available on Ontario to Maryland flights?

There is only 1 cabin class available to choose from on Ontario to Maryland flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Ontario to Maryland flights?

You could potentially save up to 19% on your flight if you consider stops on a Ontario to Maryland flight.

Cheap Ontario to Maryland flight deals and tips

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

Best Price Found	$189
Fastest flight time	4h 40m
Direct flights	Every day
Airports in Maryland	112 airports

The best one-way flight to Maryland from Ontario in the past 72 hours is $189. The best round-trip flight deal from Ontario to Maryland found on momondo in the last 72 hours is $377.

The fastest flight from Ontario to Maryland takes 4h 40m

Direct flights go from Ontario to Maryland every day.

There are 112 airports in Maryland. From Ontario there are direct flights to Baltimore/Washington (BWI).

Search flight deals

When did momondo last update prices for flights from Ontario Airport to Maryland?
Prices for flights from Ontario Airport to Maryland were last updated today.
How many operators does momondo search for flights from Ontario Airport to Maryland?
As of March 2026, there are 6 operators available to choose from for flights from Ontario Airport to Maryland.
How old do you have to be to fly from Ontario Airport to Maryland?
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 Ontario Airport to Maryland.
What documentation or ID do you need to fly to Maryland?
The travel and health documents required for your trip to Maryland can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Maryland. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from Ontario to Maryland?
momondo data reveals that the most frequently booked plane model on the route from Ontario to Maryland is Boeing 737 MAX 8, representing 25.41% of all bookings. The subsequent popular models are Boeing 737-800 Passenger/BBJ2 (winglets) at 21.31%, Airbus A321neo at 6.56%, and Boeing 737 MAX 9 at 5.74%.

Best airlines flying from Ontario to Maryland

Compare and see reviews for airlines that fly from Ontario to Maryland with momondo

Airline	Rating	Free Cancellation	Price
Spirit Airlines	PriceFrom $72	Free Cancellation	Rating 6.3 8,534 reviews	Search Spirit Airlines flights
Frontier	PriceFrom $136	Free Cancellation	Rating 5.7 3,018 reviews	Search Frontier flights
Delta	PriceFrom $183	Free Cancellation	Rating 7.9 8,322 reviews	Search Delta flights
United Airlines	PriceFrom $256	Free Cancellation	Rating 7.4 9,469 reviews	Search United Airlines flights
American Airlines	PriceFrom $311	Free Cancellation	Rating 7.1 11,491 reviews	Search American Airlines flights
Southwest	PriceFrom $339	Free Cancellation	Rating 8.0 4,331 reviews	Search Southwest flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Ontario to Maryland. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. momondo allows you to filter the results for Ontario to Maryland flights to just show those with flexible booking policies.

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

momondo helps you find the best flight between Ontario and Maryland 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 Ontario to Maryland right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Maryland, momondo offers a useful price alert feature which will track prices for flights to Maryland from Ontario and alert you when they change.