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Maryland

$94+ 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 9/3. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BWI
Aug 6 — Aug 131
Wed 8/6
Wed 8/13
1 adult, Economy
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Cheap flight deals from Ontario to Maryland

Keep the following information in mind while searching for Ontario to Maryland flight deals. Data was last updated August 1, 2025.

Round-trip from

$255
(Kiwi.com)

One-way from

$94
(Trip.com)

Popular in

December

Cheapest in

August

Average price

$307

Good round-trip deal

$337 or less

Good one-way deal

$206 or less
From Ontario to Maryland
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One-way flight from Ontario to Maryland
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Highest demand for flights based on searches. 10% potential increase in price ($43 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from Ontario to Maryland.
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Price to beat on a one-way flight from Ontario to Maryland.
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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 August 1, 2025.

This Kiwi.com deal was found by Cheapflights users on 7/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1112:59 amONT - DCA
1 stop8h 05mFrontier
Sat 8/166:00 pmDCA - ONT
1 stop8h 50mFrontier
Deal found 7/30$255
This Frontier deal was found by Cheapflights users on 7/31. 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.
Fri 8/812:59 amONT - BWI
1 stop12h 32mFrontier
Sat 8/165:26 pmBWI - ONT
1 stop9h 24mFrontier
Deal found 7/31$258
This Frontier deal was found by Cheapflights users on 7/31. 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.
Tue 8/55:21 pmONT - PHL
1 stop8h 48mFrontier
Sat 8/238:00 amPHL - ONT
1 stop11h 11mFrontier
Deal found 7/31$258
This Frontier deal was found by Cheapflights users on 8/1. 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.
Sat 8/25:13 pmONT - IAD
1 stop10h 21mFrontier
Sat 8/912:27 pmIAD - ONT
1 stop9h 47mFrontier
Deal found 8/1$258
This Jettzy deal was found by Cheapflights users on 7/31. 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 Jettzy is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/411:39 amONT - IAD
1 stop9h 44mAlaska Airlines
Wed 9/107:00 amIAD - ONT
1 stop10h 12mAlaska Airlines
Deal found 7/31$259
This Delta deal was found by Cheapflights users on 7/30. 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.
Sat 8/3011:45 amONT - IAD
1 stop8h 36mDelta
Sat 9/612:39 pmIAD - ONT
1 stop9h 32mDelta
Deal found 7/30$276
This Delta deal was found by Cheapflights users on 7/30. 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.
Sat 8/3011:45 amONT - DCA
1 stop9h 01mDelta
Sat 9/61:40 pmDCA - ONT
1 stop8h 31mDelta
Deal found 7/30$279
This United Airlines deal was found by Cheapflights users on 7/29. 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 8/275:10 amONT - IAD
1 stop8h 33mUnited Airlines
Wed 9/36:35 amIAD - ONT
1 stop8h 38mUnited Airlines
Deal found 7/29$279
This American Airlines deal was found by Cheapflights users on 8/1. 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.
Sat 11/110:57 amONT - IAD
1 stop7h 34mAmerican Airlines
Wed 11/56:04 amIAD - ONT
2 stops12h 57mAmerican Airlines
Deal found 8/1$284
This American Airlines deal was found by Cheapflights users on 8/1. 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.
Sat 11/16:15 amONT - DCA
2 stops9h 12mAmerican Airlines
Wed 11/59:48 amDCA - ONT
2 stops9h 13mAmerican Airlines
Deal found 8/1$289
This Alaska Airlines deal was found by Cheapflights users on 7/29. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/296:00 amONT - DCA
1 stop12h 59mAlaska Airlines
Mon 11/35:53 pmDCA - ONT
1 stop9h 03mAlaska Airlines
Deal found 7/29$298
This United Airlines deal was found by Cheapflights users on 7/31. 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 10/16:36 pmONT - PHL
1 stop7h 50mUnited Airlines
Tue 10/75:06 pmPHL - ONT
1 stop8h 24mUnited Airlines
Deal found 7/31$320

Cheapflights Fare Finder

 
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 August 1, 2025.
Use the filters below to find and compare flights from Ontario to Maryland that are best for you.

Fly from

Ontario

Fly to

Maryland

Route

Depart

Return

Price

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Mon 8/11

12:59 am-12:04 pm

1 stop8h 05m

Washington, D.C. Reagan-National

Sat 8/16

6:00 pm-11:50 pm

1 stop8h 50m

$255

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Mon 8/11

12:59 am-5:09 am

1 stop25h 10m

Philadelphia

Sat 10/4

6:45 am-7:54 pm

1 stop16h 09m

$258

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Tue 8/12

5:21 pm-4:31 pm

1 stop20h 10m

Baltimore/Washington

Sat 8/16

5:26 pm-11:50 pm

1 stop9h 24m

$258

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Tue 8/5

5:15 pm-6:34 am

1 stop10h 19m

Washington, D.C. Dulles Intl

Tue 8/19

6:14 am-4:18 pm

1 stop13h 04m

$258

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Thu 9/4

11:39 am-12:23 am

1 stop9h 44m

Washington, D.C. Dulles Intl

Wed 9/10

7:00 am-2:12 pm

1 stop10h 12m

$259

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Sat 8/30

11:45 am-11:21 pm

1 stop8h 36m

Washington, D.C. Dulles Intl

Sat 9/6

12:39 pm-7:11 pm

1 stop9h 32m

$276

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Sat 8/30

11:45 am-11:46 pm

1 stop9h 01m

Washington, D.C. Reagan-National

Tue 9/2

12:20 pm-7:11 pm

1 stop9h 51m

$279

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Thu 8/21

12:22 pm-11:59 pm

2 stops8h 37m

Washington, D.C. Dulles Intl

Mon 8/25

11:51 am-6:24 pm

1 stop9h 33m

$284

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Thu 8/21

12:22 pm-11:59 pm

2 stops8h 37m

Washington, D.C. Reagan-National

Mon 8/25

3:25 pm-9:39 pm

2 stops9h 14m

$289

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

Wed 10/29

6:00 am-9:59 pm

1 stop12h 59m

Washington, D.C. Reagan-National

Mon 11/3

5:53 pm-11:56 pm

1 stop9h 03m

$298

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/1

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.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Maryland

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 August 1, 2025.

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.

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 August 1, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest, and Delta from Ontario to Maryland. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,246 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,983 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.8
Good
2,611 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,904 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

  • How popular is this Ontario to Maryland flight route?

    This flight path from Ontario to Maryland was viewed by 4 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • 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 $129. Users have also found prices from $136 and $139 on Alaska Airlines and Hawaiian 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 - Philadelphia and Ontario - Washington, D.C. Reagan-National.

  • What are the cheapest flights from Ontario to Maryland?

    The cheapest flight price from Ontario to Maryland is $102. On average you can expect to pay $353. The most popular route, (Ontario - Washington, D.C. Dulles Intl), can usually be booked for $265.

  • 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

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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 2,558,603 searches. Data last updated August 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$98Average$212FlexibilityNo cancel feeOn-time65%
FrontierCheapest$148Average$223FlexibilityNo cancel feeOn-time62%
DeltaCheapest$296Average$448FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$321Average$470FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$330Average$457FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$346Average$550FlexibilityNo cancel feeOn-time71%

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