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

1 flights are operational weekly from Ontario to Maryland as of November 2025. The most popular departure day for this route is Sat, with 100% of flights per week taking off on this day.

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

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

What airlines fly to Maryland?

Spirit Airlines, United Airlines and Southwest are the top three most popular airlines that fly to Maryland from Ontario according to our data. Spirit Airlines is the first choice among our users, with 37% 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.

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 November 2025, 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.

$64 Cheap Flights from Ontario to Maryland in 2025/26

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Cheap round-trip flights

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6:00 pm - 5:40 amONT-PHL

8h 40m1 stop

10:01 pm - 7:24 amPHL-ONT

12h 23m1 stop

$184Frontier

Find Deal

Wed, Dec 24 - Sat, Jan 3

6:45 am - 5:31 amONT-PHL

19h 46m1 stop

10:01 pm - 7:24 amPHL-ONT

12h 23m1 stop

$185Frontier

Find Deal

Fri, Dec 26 - Sat, Jan 3

8:31 am - 12:07 pmONT-BWI

24h 36m1 stop

11:22 am - 7:36 amBWI-ONT

23h 14m2 stops

$197Frontier

Find Deal

Fri, Jan 9 - Sun, Jan 11

7:00 am - 7:48 pmONT-PHL

33h 48m2 stops

1:05 pm - 11:56 pmPHL-ONT

13h 51m1 stop

$241Multiple Airlines

Find Deal

Sat, Jan 10 - Mon, Jan 12

6:10 am - 10:57 pmONT-BWI

13h 47m1 stop

1:00 pm - 7:57 pmBWI-ONT

9h 57m1 stop

$286American Airlines

Find Deal

Sat, Feb 14 - Wed, Feb 18

12:12 pm - 10:08 pmONT-BWI

6h 56m1 stop

7:00 am - 12:16 pmBWI-ONT

8h 16m1 stop

$287Delta

Find Deal

Sat, Dec 13 - Wed, Jan 7

6:10 am - 10:57 pmONT-BWI

13h 47m1 stop

8:00 am - 6:39 pmBWI-ONT

13h 39m2 stops

$291American Airlines

Find Deal

Sat, Feb 14 - Wed, Feb 18

5:00 am - 9:27 pmONT-BWI

13h 27m2 stops

4:09 pm - 8:50 pmBWI-ONT

7h 41m1 stop

$292United Airlines

Find Deal

Sat, Feb 14 - Wed, Feb 18

7:30 am - 11:44 pmONT-BWI

13h 14m2 stops

6:00 am - 1:54 pmBWI-ONT

10h 54m2 stops

$296Delta

Find Deal

Wed, Feb 18 - Tue, Feb 24

5:00 am - 3:44 pmONT-IAD

7h 44m1 stop

4:10 pm - 10:57 pmIAD-ONT

9h 47m1 stop

$319United Airlines

Find Deal

Sat, Feb 14 - Wed, Feb 18

Frontier flights from Ontario to Maryland

Our best Frontier deals on Ontario to Maryland flight tickets

Frontier

Dec 24

ONT6:00 pmOntario

8h 40m

1 stop

PHL5:40 amPhiladelphia

Jan 3

PHL10:01 pmPhiladelphia

12h 23m

1 stop

ONT7:24 amOntario

$184

Find similar

Frontier

Dec 26

ONT6:45 amOntario

19h 46m

1 stop

PHL5:31 amPhiladelphia

Jan 3

PHL10:01 pmPhiladelphia

12h 23m

1 stop

ONT7:24 amOntario

$185

Find similar

Frontier

Jan 9

ONT8:31 amOntario

24h 36m

1 stop

BWI12:07 pmBaltimore/Washington

Jan 11

BWI11:22 amBaltimore/Washington

23h 14m

2 stops

ONT7:36 amOntario

$197

Find similar

Alaska Airlines flights from Ontario to Maryland

Our best Alaska Airlines deals on Ontario to Maryland flight tickets

Alaska Airlines

Jan 13

ONT4:03 pmOntario

21h 23m

1 stop

IAD4:26 pmWashington, D.C. Dulles Intl

Jan 20

IAD6:04 pmWashington, D.C. Dulles Intl

24h 04m

1 stop

ONT3:08 pmOntario

$306

Find similar

Alaska Airlines

Dec 16

ONT6:00 amOntario

9h 16m

1 stop

BWI6:16 pmBaltimore/Washington

Jan 6

BWI7:04 amBaltimore/Washington

11h 38m

1 stop

ONT3:42 pmOntario

$336

Find similar

Alaska Airlines

Dec 10

ONT6:00 amOntario

8h 53m

1 stop

PHL5:53 pmPhiladelphia

Jan 17

PHL7:06 pmPhiladelphia

18h 53m

1 stop

ONT10:59 amOntario

$341

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Wed 12/24

6:00 pm-5:40 am

1 stop8h 40m

Philadelphia

Sat 1/3

10:01 pm-7:24 am

1 stop12h 23m

$184

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Fri 12/26

6:45 am-5:31 am

1 stop19h 46m

Philadelphia

Sat 1/3

10:01 pm-7:24 am

1 stop12h 23m

$185

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Fri 1/9

8:31 am-12:07 pm

1 stop24h 36m

Baltimore/Washington

Sun 1/11

11:22 am-7:36 am

2 stops23h 14m

$197

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Sat 1/10

7:00 am-7:48 pm

2 stops33h 48m

Philadelphia

Mon 1/12

1:05 pm-11:56 pm

1 stop13h 51m

$241

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Sat 2/14

6:10 am-10:57 pm

1 stop13h 47m

Baltimore/Washington

Wed 2/18

1:00 pm-7:57 pm

1 stop9h 57m

$286

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Sat 12/13

12:12 pm-10:08 pm

1 stop6h 56m

Baltimore/Washington

Wed 1/7

7:00 am-12:16 pm

1 stop8h 16m

$287

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Sat 2/14

6:10 am-10:57 pm

1 stop13h 47m

Baltimore/Washington

Wed 2/18

8:00 am-6:39 pm

2 stops13h 39m

$291

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Sat 2/14

5:00 am-9:27 pm

2 stops13h 27m

Baltimore/Washington

Wed 2/18

4:09 pm-8:50 pm

1 stop7h 41m

$292

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Wed 2/18

7:30 am-11:44 pm

2 stops13h 14m

Baltimore/Washington

Tue 2/24

6:00 am-1:54 pm

2 stops10h 54m

$296

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Sat 2/14

5:00 am-3:44 pm

1 stop7h 44m

Washington, D.C. Dulles Intl

Wed 2/18

4:10 pm-10:57 pm

1 stop9h 47m

$319

Flights are sorted by cheapest round-trip flights first.

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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 September. Flight prices, which tend to average around $226, are often lower during this time because this is during the off-season. If you don’t want to visit Maryland in September, then you should wait until May to fly from Ontario, when ticket prices are also cheap, with an average price of $228.

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

The cheapest day to depart from Ontario to Maryland is on a Wednesday. Travelers who choose to depart for Maryland on a Wednesday will often find tickets for as low as $314. The most expensive day to fly to Maryland is Sunday, with ticket prices averaging around $492.

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

Our most recent data shows that the best time of day to fly to Maryland is in the afternoon. Flights from Ontario to Maryland during this time can be as low as $288. In contrast, the most expensive time of day to depart to Maryland is at noon when prices are around $423.

What is the cheapest Ontario to Maryland flight route?

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

How far in advance should I book a flight to Maryland?

You are more likely to see cheaper flights to Maryland from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Maryland for around $455 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Maryland from Ontario for as low as $297 on momondo.

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?

No. A direct flight is the cheapest option for a flight between Ontario to Maryland.

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	$196
Fastest flight time	4h 40m
Direct flights	Mon, Tue, Wed, Fri, Sat and Sun
Airports in Maryland	1 airport

The best one-way flight to Maryland from Ontario in the past 72 hours is $196. The best round-trip flight deal from Ontario to Maryland found on momondo in the last 72 hours is $533.

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

Direct flights go from Ontario to Maryland on Monday, Tuesday, Wednesday, Friday, Saturday and Sunday. There are no airlines offering direct flights.

There is 1 airport near Maryland: 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 November 2025, 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 737-800 Passenger/BBJ2 (winglets), representing 21.24% of all bookings. The subsequent popular models are Boeing 737 MAX 8 at 16.81%, Airbus A321neo at 11.50%, and Airbus A318/A319/A320/A321 at 7.96%.

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 $98	Free Cancellation	Rating 6.3 8,161 reviews	Search Spirit Airlines flights
Frontier	PriceFrom $175	Free Cancellation	Rating 5.8 3,100 reviews	Search Frontier flights
United Airlines	PriceFrom $276	Free Cancellation	Rating 7.4 9,056 reviews	Search United Airlines flights
Delta	PriceFrom $326	Free Cancellation	Rating 7.9 8,011 reviews	Search Delta flights
Southwest	PriceFrom $337	Free Cancellation	Rating 8.0 4,255 reviews	Search Southwest flights
American Airlines	PriceFrom $346	Free Cancellation	Rating 7.2 11,043 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.

An easier way to manage your Maryland trip

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Find better results for your trip to Maryland

Popular cities in Maryland

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Cheap flights from Ontario to Maryland from $63

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Maryland departing on 1/21. 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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Big names and deals

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Filter for what you want

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Find the cheapest flights from Ontario to Maryland

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Frontier flights from Ontario to Maryland

Our best Frontier deals on Ontario to Maryland flight tickets

Alaska Airlines flights from Ontario to Maryland

Our best Alaska Airlines deals on Ontario to Maryland flight tickets

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Use the filters below to find and compare flights from Ontario to Maryland that are best for you.

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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

What is the cheapest month to fly to Maryland?

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

The cheapest day to depart from Ontario to Maryland is on a Wednesday. Travelers who choose to depart for Maryland on a Wednesday will often find tickets for as low as $314. The most expensive day to fly to Maryland is Sunday, with ticket prices averaging around $492.

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

Our most recent data shows that the best time of day to fly to Maryland is in the afternoon. Flights from Ontario to Maryland during this time can be as low as $288. In contrast, the most expensive time of day to depart to Maryland is at noon when prices are around $423.

What is the cheapest Ontario to Maryland flight route?

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

How far in advance should I book a flight to Maryland?

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?

No. A direct flight is the cheapest option for a flight between Ontario to Maryland.

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

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

What airlines fly to Maryland?

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

1 flights are operational weekly from Ontario to Maryland as of November 2025. The most popular departure day for this route is Sat, with 100% of flights per week taking off on this day.

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

Fastest flight time

Direct flights

Airports in Maryland

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

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

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

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

What is the most popular plane model from Ontario to Maryland?

Best airlines flying from Ontario to Maryland

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

Why use momondo?

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

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

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

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

An easier way to manage your Maryland trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Maryland

Popular cities in Maryland

Popular flights according to clicks in the last 7 days on momondo