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 36% of people opting to fly with this airline when traveling to Maryland. Keep in mind that there are 7 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 day?

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

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

Frontier, Delta, and Southwest are the most popular carriers operating from Ontario to Maryland

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

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

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 May 2026, there are 5 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.

$86 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.

4:39 pm - 6:21 am

ONT

PHL

10h 42m

1 stop

10:40 am - 7:32 pm

PHL

ONT

11h 52m

1 stop

$190Frontier

Tue, May 26 - Mon, Jun 1

6:00 am - 5:37 am

ONT

PHL

20h 37m

1 stop

8:35 pm - 10:05 am

PHL

ONT

16h 30m

1 stop

$200Frontier

Wed, May 20 - Sat, May 23

1:39 pm - 6:21 am

ONT

PHL

13h 42m

1 stop

10:40 am - 7:32 pm

PHL

ONT

11h 52m

1 stop

$205Frontier

Tue, May 26 - Mon, Jun 1

4:39 pm - 5:10 am

ONT

PHL

9h 31m

1 stop

8:35 pm - 11:49 pm

PHL

ONT

30h 14m

1 stop

$210Frontier

Wed, May 27 - Wed, Jun 3

1:39 pm - 8:12 am

ONT

IAD

15h 33m

1 stop

9:55 am - 3:08 pm

IAD

ONT

8h 13m

1 stop

$210Frontier

Wed, May 27 - Tue, Jun 9

8:06 pm - 8:18 pm

ONT

BWI

21h 12m

1 stop

5:17 pm - 7:48 am

BWI

ONT

17h 31m

1 stop

$215Frontier

Wed, Jun 3 - Fri, Jun 5

8:06 pm - 4:16 pm

ONT

PHL

17h 10m

1 stop

11:00 am - 7:51 pm

PHL

ONT

11h 51m

1 stop

$215Frontier

Fri, Jun 5 - Wed, Jun 10

6:00 am - 9:58 pm

ONT

DCA

12h 58m

1 stop

7:00 am - 10:05 am

DCA

ONT

30h 05m

1 stop

$215Frontier

Wed, Jun 3 - Sun, Jun 7

7:13 pm - 11:02 am

ONT

SBY

12h 49m

2 stops

4:34 pm - 10:36 pm

SBY

ONT

9h 02m

1 stop

$900American Airlines

Thu, Jun 18 - Mon, Jun 29

7:13 pm - 11:02 am

ONT

SBY

12h 49m

2 stops

11:27 am - 9:57 pm

SBY

ONT

13h 30m

2 stops

$905American Airlines

Thu, Jun 18 - Mon, Jun 29

Delta flights from Ontario to Maryland

Our best Delta deals on Ontario to Maryland flight tickets

Delta

May 24

ONT12:07 pmOntario

9h 50m

1 stop

PHL12:57 amPhiladelphia

May 27

PHL7:25 amPhiladelphia

7h 54m

1 stop

ONT12:19 pmOntario

$263

Delta

Aug 3

ONT10:00 pmOntario

8h 36m

1 stop

PHL9:36 amPhiladelphia

Aug 11

PHL5:15 amPhiladelphia

8h 27m

1 stop

ONT10:42 amOntario

$273

Delta

May 19

ONT10:00 pmOntario

17h 53m

2 stops

IAD6:53 pmWashington, D.C. Dulles Intl

Jun 1

IAD12:40 pmWashington, D.C. Dulles Intl

8h 56m

1 stop

ONT6:36 pmOntario

$418

Frontier flights from Ontario to Maryland

Our best Frontier deals on Ontario to Maryland flight tickets

Frontier

May 26

ONT4:39 pmOntario

10h 42m

1 stop

PHL6:21 amPhiladelphia

Jun 1

PHL10:40 amPhiladelphia

11h 52m

1 stop

ONT7:32 pmOntario

$190

Frontier

May 20

ONT6:00 amOntario

20h 37m

1 stop

PHL5:37 amPhiladelphia

May 23

PHL8:35 pmPhiladelphia

16h 30m

1 stop

ONT10:05 amOntario

$200

Frontier

May 26

ONT1:39 pmOntario

13h 42m

1 stop

PHL6:21 amPhiladelphia

Jun 1

PHL10:40 amPhiladelphia

11h 52m

1 stop

ONT7:32 pmOntario

$205

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Tue 5/26

4:39 pm-6:21 am

1 stop10h 42m

Philadelphia

Mon 6/1

10:40 am-7:32 pm

1 stop11h 52m

$190

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Wed 5/20

6:00 am-5:37 am

1 stop20h 37m

Philadelphia

Sat 5/23

8:35 pm-10:05 am

1 stop16h 30m

$200

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Tue 5/26

1:39 pm-6:21 am

1 stop13h 42m

Philadelphia

Mon 6/1

10:40 am-7:32 pm

1 stop11h 52m

$205

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Wed 5/27

4:39 pm-5:10 am

1 stop9h 31m

Philadelphia

Wed 6/3

8:35 pm-11:49 pm

1 stop30h 14m

$210

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 5/27

1:39 pm-8:12 am

1 stop15h 33m

Washington, D.C. Dulles Intl

Tue 6/9

9:55 am-3:08 pm

1 stop8h 13m

$210

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Wed 6/3

8:06 pm-8:18 pm

1 stop21h 12m

Baltimore/Washington

Fri 6/5

5:17 pm-7:48 am

1 stop17h 31m

$215

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Fri 6/5

8:06 pm-4:16 pm

1 stop17h 10m

Philadelphia

Wed 6/10

11:00 am-7:51 pm

1 stop11h 51m

$215

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Wed 6/3

6:00 am-9:58 pm

1 stop12h 58m

Washington, D.C. Reagan-National

Sun 6/7

7:00 am-10:05 am

1 stop30h 05m

$215

Quickest round-trip

OntarioSalisbury

ONT - SBY

ONTSBY

Ontario

Thu 6/18

7:13 pm-11:02 am

2 stops12h 49m

Salisbury-Ocean City

Mon 6/29

4:34 pm-10:36 pm

1 stop9h 02m

$900

OntarioSalisbury

ONT - SBY

ONTSBY

Ontario

Thu 6/18

7:13 pm-11:02 am

2 stops12h 49m

Salisbury-Ocean City

Mon 6/29

11:27 am-9:57 pm

2 stops13h 30m

$905

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 June. Flight prices, which tend to average around $72, are often lower during this time because this is during the off-season. If you don’t want to visit Maryland in June, then you should wait until September to fly from Ontario, when ticket prices are also cheap, with an average price of $98.

What is the cheapest Ontario to Maryland flight route?

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

Can stopping save me money on Ontario to Maryland flights?

You could potentially save up to 22% 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	$224
Fastest flight time	4h 45m
Direct flights	Every day
Airports in Maryland	112 airports

The best one-way flight to Maryland from Ontario in the past 72 hours is $224. The best round-trip flight deal from Ontario to Maryland found on momondo in the last 72 hours is $462.

The fastest flight from Ontario to Maryland takes 4h 45m

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

Frequently asked questions about flying from Ontario to Maryland

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 May 2026, there are 5 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 29.66% of all bookings. The subsequent popular models are Boeing 737-800 Passenger/BBJ2 (winglets) at 23.45%, Airbus A318/A319/A320/A321 at 5.52%, and Boeing 757-200 (winglets) at 5.52%.

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
Delta	PriceFrom $128	Free Cancellation	Rating 7.9 8,456 reviews	Search Delta flights
Frontier	PriceFrom $136	Free Cancellation	Rating 5.6 2,962 reviews	Search Frontier flights
United Airlines	PriceFrom $256	Free Cancellation	Rating 7.4 9,694 reviews	Search United Airlines flights
Southwest	PriceFrom $339	Free Cancellation	Rating 7.9 4,302 reviews	Search Southwest flights
American Airlines	PriceFrom $351	Free Cancellation	Rating 7.1 11,667 reviews	Search American Airlines 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.