HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Maryland

$63+ 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 1/25. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BWI
Dec 24 — Dec 311
Tue 12/24
Tue 12/31
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Maryland with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 December 19, 2024.

Round-trip from

$138
(CheapOair)

One-way from

$83
(Cheapflightsfares)
From Ontario to Maryland
Search Deals
One-way flight from Ontario to Maryland
Search Deals

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 December 19, 2024.

This Mytrip deal was found by Cheapflights users on 12/19. 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 Mytrip 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
Sat 1/116:00 pmDCA - ONT
1 stop8h 44mFrontier
Deal found 12/19$236
This CheapOair deal was found by Cheapflights users on 12/18. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2512:59 amONT - PHL
1 stop25h 10mFrontier
Sun 1/129:53 pmPHL - ONT
1 stop22h 42mFrontier
Deal found 12/18$238
This Frontier deal was found by Cheapflights users on 12/18. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2912:59 amONT - BWI
1 stop9h 27mFrontier
Fri 1/32:16 pmBWI - ONT
1 stop12h 43mFrontier
Deal found 12/18$374
This Delta deal was found by Cheapflights users on 12/18. 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.
Wed 12/255:30 amONT - PHL
1 stop9h 20mDelta
Wed 1/15:38 amPHL - ONT
1 stop8h 08mDelta
Deal found 12/18$407
This United Airlines deal was found by Cheapflights users on 12/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/311:42 pmONT - BWI
1 stop6h 46mUnited Airlines
Wed 1/16:35 amBWI - ONT
1 stop9h 05mUnited Airlines
Deal found 12/19$456
This United Airlines deal was found by Cheapflights users on 12/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/311:42 pmONT - IAD
1 stop6h 43mUnited Airlines
Sun 1/56:30 amIAD - ONT
1 stop9h 10mUnited Airlines
Deal found 12/19$538
This United Airlines deal was found by Cheapflights users on 12/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/315:05 amONT - PHL
2 stops9h 31mUnited Airlines
Sun 1/53:35 pmPHL - ONT
1 stop8h 14mUnited Airlines
Deal found 12/19$541
This American Airlines deal was found by Cheapflights users on 12/19. 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.
Wed 12/257:15 amONT - DCA
1 stop8h 41mAmerican Airlines
Wed 1/15:14 pmDCA - ONT
1 stop8h 14mAmerican Airlines
Deal found 12/19$545
This American Airlines deal was found by Cheapflights users on 12/19. 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.
Wed 12/2510:46 amONT - IAD
1 stop8h 53mAmerican Airlines
Wed 1/155:24 pmIAD - ONT
1 stop8h 21mAmerican Airlines
Deal found 12/19$551
This Delta deal was found by Cheapflights users on 12/19. 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.
Tue 12/316:52 amONT - BWI
1 stop8h 21mDelta
Mon 1/67:15 amBWI - ONT
1 stop8h 11mDelta
Deal found 12/19$552
This Southwest deal was found by Cheapflights users on 12/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/301:05 pmONT - DCA
1 stop6h 50mSouthwest
Sat 1/411:55 amDCA - ONT
2 stops10h 00mSouthwest
Deal found 12/19$616
This United Airlines deal was found by Cheapflights users on 12/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/266:00 amONT - DCA
1 stop7h 52mUnited Airlines
Sat 1/114:33 pmDCA - ONT
1 stop8h 24mUnited Airlines
Deal found 12/19$621

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 2,558,603 searches. Data last updated December 19, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Fri 2/14

12:59 am-6:39 pm

1 stop14h 40m

Philadelphia

Sat 2/22

8:00 am-7:09 pm

1 stop14h 09m

$138

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Mon 1/6

4:51 pm-12:01 pm

1 stop16h 10m

Washington, D.C. Reagan-National

Tue 1/7

6:00 pm-11:44 pm

1 stop8h 44m

$178

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Thu 3/6

4:39 pm-11:30 am

1 stop15h 51m

Baltimore/Washington

Mon 3/10

12:30 pm-12:09 am

1 stop14h 39m

$234

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Sat 2/22

6:05 am-4:12 pm

1 stop7h 07m

Washington, D.C. Dulles Intl

Sat 3/1

5:13 pm-10:16 pm

1 stop8h 03m

$342

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Wed 1/29

1:21 pm-11:34 pm

1 stop7h 13m

Baltimore/Washington

Tue 2/4

6:00 am-11:50 am

1 stop8h 50m

$348

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Sat 1/25

6:00 am-4:00 pm

1 stop7h 00m

Washington, D.C. Reagan-National

Tue 1/28

6:00 am-11:50 am

1 stop8h 50m

$366

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Thu 1/9

1:21 pm-11:36 pm

1 stop7h 15m

Washington, D.C. Dulles Intl

Sat 1/18

4:05 pm-10:32 pm

1 stop9h 27m

$366

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Sat 2/1

6:00 am-5:57 pm

1 stop8h 57m

Washington, D.C. Dulles Intl

Tue 2/4

6:57 pm-10:38 am

1 stop18h 41m

$368

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Sat 2/22

12:50 pm-12:45 am

2 stops8h 55m

Washington, D.C. Reagan-National

Sat 3/1

5:15 pm-10:16 pm

1 stop8h 01m

$371

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Tue 1/28

1:00 pm-10:52 pm

1 stop6h 52m

Philadelphia

Thu 1/30

6:40 pm-11:53 pm

1 stop8h 13m

$371

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/18

Showing 1-10 of 51 results
1
2
3
...
6

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 March is currently the most expensive (average of $290). 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 December 19, 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 December 19, 2024.
Peruse reviews from past customers who have flown with Frontier, United Airlines and Delta 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
4,836 reviews

Food

7.2

Crew

8.7

Entertainment

7.7

Comfort

8.1

Boarding

8.2

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,836 reviews
Southwest
8.1
Very good
4,836 reviews

Food

7.2

Crew

8.7

Entertainment

7.7

Comfort

8.1

Boarding

8.2

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,551 reviews
Southwest
8.1
Very good
4,836 reviews

Food

7.2

Crew

8.7

Entertainment

7.7

Comfort

8.1

Boarding

8.2

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,600 reviews
Southwest
8.1
Very good
4,836 reviews

Food

7.2

Crew

8.7

Entertainment

7.7

Comfort

8.1

Boarding

8.2

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Qatar Airways
7.5
Good
3,792 reviews
Southwest
8.1
Very good
4,836 reviews

Food

7.2

Crew

8.7

Entertainment

7.7

Comfort

8.1

Boarding

8.2

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
9,048 reviews
Southwest
8.1
Very good
4,836 reviews

Food

7.2

Crew

8.7

Entertainment

7.7

Comfort

8.1

Boarding

8.2

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

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 $83. Users have also found prices from $162 and $168 on Delta and Alaska Airlines, 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. Dulles Intl, Ontario - Baltimore/Washington and Ontario - Washington, D.C. Reagan-National.

  • 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 March is currently the most expensive (average of $290). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Maryland

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to John F Kennedy Intl flights
Los Angeles to Newark flights
Los Angeles to Honolulu flights
San Francisco to John F Kennedy Intl flights
Los Angeles to Seattle flights
Los Angeles to LaGuardia flights
San Francisco to Las Vegas flights
Los Angeles to Dallas/Fort Worth flights
Los Angeles to Las Vegas flights
San Francisco to Los Angeles flights
Los Angeles to Miami flights
San Francisco to Newark flights
Santa Ana to Las Vegas flights
Los Angeles to Orlando flights
Los Angeles to San Francisco flights
Burbank to Las Vegas flights
Los Angeles to O'Hare Intl flights
San Jose to Las Vegas flights
Los Angeles to Hobby flights
San Francisco to Seattle flights
San Francisco to Honolulu flights
Los Angeles to Fort Lauderdale flights
Oakland to Las Vegas flights
San Francisco to Dallas/Fort Worth flights
Los Angeles to Reagan-National flights
Santa Ana to Newark flights
Ontario to Dallas/Fort Worth flights
Los Angeles to Baltimore flights
Los Angeles to George Bush Intcntl flights
Los Angeles to Boston flights
Ontario to Seattle flights
Los Angeles to Portland flights
San Francisco to LaGuardia flights
Los Angeles to New Orleans flights
San Jose to Los Angeles flights
San Francisco to Miami flights
Los Angeles to Dulles Intl flights
Los Angeles to Atlanta flights
Los Angeles to San Jose flights
Oakland to Santa Ana flights
Burbank to Newark flights
Oakland to Los Angeles flights
Los Angeles to Salt Lake City flights
Santa Ana to Seattle flights
Burbank to LaGuardia flights
Los Angeles to Denver flights
Los Angeles to Sky Harbor Intl flights
Ontario to San Francisco flights
San Francisco to Sky Harbor Intl flights
San Diego to John F Kennedy Intl flights

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 2,558,603 searches. Data last updated December 19, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$148Average$275FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$151Average$250FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$256Average$552FlexibilityNo cancel feeOn-time69%
DeltaCheapest$296Average$502FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$301Average$461FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$316Average$563FlexibilityNo cancel feeOn-time71%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.