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$70+ Cheap flights from Ontario (ONT) to Maryland

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/23. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BWI
Nov 25 — Dec 21
Mon 11/25
Mon 12/2
1 adult, Economy
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Cheap flight deals from Ontario to Maryland

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Maryland (USMD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 20, 2024.

Find flight deals from Ontario to Maryland

Cheapest flights from Ontario to Maryland
Explore the most affordable flight options available from Ontario to Maryland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 20, 2024.

This FlightHub deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2512:59 amONT - DCA
1 stop8h 09mFrontier
Sun 1/56:00 pmDCA - ONT
1 stop8h 59mFrontier
Deal found 11/19$178
This CheapOair deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/195:34 pmONT - BWI
1 stop16h 52mFrontier
Mon 12/232:16 pmBWI - ONT
1 stop12h 43mFrontier
Deal found 11/19$268
This American Airlines deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/106:20 amONT - BWI
1 stop12h 57mAmerican Airlines
Wed 12/116:02 amBWI - ONT
1 stop8h 59mAmerican Airlines
Deal found 11/19$310
This CheapOair deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/1712:59 amONT - PHL
1 stop25h 10mFrontier
Wed 12/256:40 amPHL - ONT
1 stop20h 19mFrontier
Deal found 11/20$328
This American Airlines deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/176:20 amONT - DCA
1 stop11h 15mAmerican Airlines
Mon 1/66:30 amDCA - ONT
1 stop8h 16mAmerican Airlines
Deal found 11/20$335
This American Airlines deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/176:20 amONT - IAD
1 stop10h 08mAmerican Airlines
Mon 1/65:15 pmIAD - ONT
1 stop9h 42mAmerican Airlines
Deal found 11/20$335
This Delta deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/255:30 amONT - DCA
1 stop7h 30mDelta
Wed 1/85:10 pmDCA - ONT
1 stop9h 43mDelta
Deal found 11/20$336
This Delta deal was found by Cheapflights users on 11/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/251:18 pmONT - IAD
1 stop7h 31mDelta
Tue 11/267:00 amIAD - ONT
1 stop8h 11mDelta
Deal found 11/18$336
This Delta deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/256:52 amONT - BWI
1 stop8h 21mDelta
Wed 1/87:15 amBWI - ONT
1 stop7h 35mDelta
Deal found 11/20$351
This Delta deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/126:00 amONT - PHL
1 stop8h 34mDelta
Sat 12/144:44 pmPHL - ONT
1 stop9h 57mDelta
Deal found 11/19$353
This American Airlines deal was found by Cheapflights users on 11/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/267:30 pmONT - PHL
1 stop7h 45mAmerican Airlines
Wed 1/810:31 amPHL - ONT
2 stops10h 53mAmerican Airlines
Deal found 11/18$386
This United Airlines deal was found by Cheapflights users on 11/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/255:05 amONT - IAD
1 stop7h 34mUnited Airlines
Tue 12/316:35 amIAD - ONT
1 stop9h 05mUnited Airlines
Deal found 11/18$403

Find flights from Ontario to Maryland within your budget

Customize your flight search to find flights from Ontario to Maryland that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,629,791 searches. Data last updated November 20, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Wed 12/25

12:59 am-12:08 pm

1 stop8h 09m

Washington, D.C. Reagan-National

Sun 1/5

6:00 pm-11:59 pm

1 stop8h 59m

$178

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Thu 12/19

5:34 pm-1:26 pm

1 stop16h 52m

Baltimore/Washington

Mon 12/23

2:16 pm-11:59 pm

1 stop12h 43m

$268

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Tue 12/10

6:20 am-10:17 pm

1 stop12h 57m

Baltimore/Washington

Wed 12/11

6:02 am-12:01 pm

1 stop8h 59m

$310

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 2/12

6:00 am-4:14 pm

1 stop7h 14m

Washington, D.C. Dulles Intl

Tue 2/18

6:30 am-9:02 pm

1 stop17h 32m

$310

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Sat 3/1

6:00 am-9:59 pm

1 stop12h 59m

Washington, D.C. Reagan-National

Sat 3/8

12:59 pm-11:44 pm

1 stop13h 45m

$327

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Tue 12/17

12:59 am-5:09 am

1 stop25h 10m

Philadelphia

Wed 12/25

6:40 am-11:59 pm

1 stop20h 19m

$328

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Sat 3/1

6:00 am-5:56 pm

1 stop8h 56m

Baltimore/Washington

Sat 3/8

1:03 pm-11:44 pm

1 stop13h 41m

$333

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Tue 12/17

6:20 am-8:35 pm

1 stop11h 15m

Washington, D.C. Reagan-National

Mon 1/6

6:30 am-11:46 am

1 stop8h 16m

$335

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Wed 12/25

5:30 am-4:00 pm

1 stop7h 30m

Washington, D.C. Reagan-National

Wed 1/8

5:10 pm-11:53 pm

1 stop9h 43m

$336

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Sat 2/1

5:10 am-3:49 pm

1 stop7h 39m

Washington, D.C. Dulles Intl

Wed 2/5

12:35 pm-6:04 pm

1 stop8h 29m

$336

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/19

Showing 1-10 of 54 results
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Best time to book a flight from Ontario to Maryland

Have a flexible travel schedule? Discover the best time to fly to Maryland from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Ontario to Maryland

Get recent, data-driven insights about flights from Ontario to Maryland including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Ontario to Maryland?

Currently, August is the cheapest month in which you can book a flight from Ontario to Maryland (average of $241). Flying from Ontario to Maryland in January is currently the most expensive (average of $273). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to MD?

Find hourly flight availability from Ontario to Maryland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 20, 2024.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Maryland as you normally would.

Rainfall in Maryland by month

Plan your trip to Maryland by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Maryland ranges from 2.9 - 4.1 inches per month. July is typically the wettest month, when rainfall can reach 4.1 in. February is typically the driest time to visit Maryland when rainfall is around 2.9 in.

Temperature in Maryland by month

Plan your trip to Maryland by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Maryland, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 77.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 33.8 F).

Reviews of airlines servicing Maryland

Get insights into the airlines that provide service to Maryland. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Maryland. Reviews last updated November 20, 2024.
Peruse reviews from past customers who have flown with Southwest, American Airlines and Frontier from Ontario to Maryland to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
5,014 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Food

7.2

Boarding

8.2

Crew

8.7

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Southwest
8.1
Very good
5,014 reviews
Southwest
8.1
Very good
5,014 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Food

7.2

Boarding

8.2

Crew

8.7

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Alaska Airlines
8.0
Very good
9,461 reviews
Southwest
8.1
Very good
5,014 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Food

7.2

Boarding

8.2

Crew

8.7

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Delta
8.0
Very good
8,756 reviews
Southwest
8.1
Very good
5,014 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Food

7.2

Boarding

8.2

Crew

8.7

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

United Airlines
7.4
Good
9,171 reviews
Southwest
8.1
Very good
5,014 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Food

7.2

Boarding

8.2

Crew

8.7

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
5,014 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Food

7.2

Boarding

8.2

Crew

8.7

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Related info for your journey

Find useful and relevant information for your journey from Ontario to Maryland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Maryland?

    Located just 3.1 mi from the city center, Ontario (ONT) is the airport most travelers will use when flying to Maryland from Ontario.

  • What are the cheapest airlines to fly from Ontario to Maryland one-way?

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $70. Users have also found prices from $142 and $168 on American Airlines and Delta, respectively.

  • What are the most popular routes from Ontario to Maryland?

    The most popular flight routes from Ontario to Maryland are Ontario - Washington, D.C. Reagan-National, Ontario - Baltimore/Washington and Ontario - Philadelphia.

  • Can I find deals for flights from Ontario to Maryland that include hotel bookings?

    Yes. In addition to deals on Ontario to Maryland flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Maryland?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Maryland.

  • Can I find deals for business class flights from Ontario to Maryland?

    Yes. Cheapflights offers flight deals from Ontario to Maryland by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Maryland?

    Currently, August is the cheapest month in which you can book a flight from Ontario to Maryland (average of $241). Flying from Ontario to Maryland in January is currently the most expensive (average of $273). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Ontario to Maryland

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Ontario to Maryland

Discover the top 6 airlines that operate flights from Ontario to Maryland. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,629,791 searches. Data last updated November 20, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$148Average$284FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$151Average$234FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$254Average$533FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$286Average$437FlexibilityNo cancel feeOn-time63%
DeltaCheapest$296Average$514FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$296Average$547FlexibilityNo cancel feeOn-time71%
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