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

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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — ONT
Nov 26 — Dec 31
Tue 11/26
Tue 12/3
1 adult, Economy
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Cheap flight deals from Maryland to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Maryland (USMD) to Ontario (ONT). 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 21, 2024.

Find flight deals from Maryland to Ontario

Cheapest flights from Maryland to Ontario
Explore the most affordable flight options available from Maryland to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 21, 2024.

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.
Wed 12/186:40 amPHL - ONT
1 stop20h 19mFrontier
Tue 12/2412:59 amONT - PHL
1 stop25h 10mFrontier
Deal found 11/20$178
This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/176:00 pmDCA - ONT
1 stop8h 59mFrontier
Thu 12/2612:59 amONT - DCA
1 stop8h 09mFrontier
Deal found 11/20$204
This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/410:10 amBWI - ONT
2 stops16h 34mFrontier
Tue 12/1712:59 amONT - BWI
2 stops12h 54mFrontier
Deal found 11/19$300
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 12/116:55 amIAD - ONT
1 stop8h 30mDelta
Sat 1/117:00 amONT - IAD
1 stop7h 02mDelta
Deal found 11/20$336
This Delta deal was found by Cheapflights users on 11/21. 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 12/116:00 amDCA - ONT
1 stop8h 01mDelta
Tue 1/76:00 amONT - DCA
2 stops9h 57mDelta
Deal found 11/21$341
This Delta deal was found by Cheapflights users on 11/21. 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 12/114:41 pmBWI - ONT
1 stop9h 21mDelta
Tue 1/71:21 pmONT - BWI
1 stop7h 13mDelta
Deal found 11/21$346
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.
Thu 11/2810:42 amPHL - ONT
1 stop8h 07mAmerican Airlines
Thu 12/127:30 pmONT - PHL
1 stop6h 56mAmerican Airlines
Deal found 11/20$358
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.
Thu 12/125:30 amPHL - ONT
1 stop8h 31mDelta
Mon 12/166:00 amONT - PHL
1 stop8h 34mDelta
Deal found 11/20$360
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.
Sun 12/85:00 amIAD - ONT
2 stops13h 25mAmerican Airlines
Thu 12/1212:53 pmONT - IAD
1 stop6h 31mAmerican Airlines
Deal found 11/20$427
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/256:30 amIAD - ONT
1 stop9h 10mUnited Airlines
Tue 1/71:43 pmONT - IAD
1 stop6h 47mUnited Airlines
Deal found 11/20$436
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/56:20 pmPHL - ONT
1 stop8h 38mUnited Airlines
Sun 12/155:05 amONT - PHL
1 stop7h 36mUnited Airlines
Deal found 11/19$438
This KAYAK 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/95:45 pmIAD - ONT
1 stop7h 25mSouthwest
Thu 12/1210:00 amONT - IAD
2 stops10h 00mSouthwest
Deal found 11/20$439

Find flights from Maryland to Ontario within your budget

Customize your flight search to find flights from Maryland to Ontario 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 21, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

Wed 12/18

6:40 am-11:59 pm

1 stop20h 19m

Ontario

Tue 12/24

12:59 am-5:09 am

1 stop25h 10m

$178

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Wed 2/19

1:03 pm-12:09 am

1 stop14h 06m

Ontario

Sat 2/22

12:59 am-12:03 pm

1 stop8h 04m

$201

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Wed 12/4

10:10 am-11:44 pm

2 stops16h 34m

Ontario

Tue 12/17

12:59 am-4:53 pm

2 stops12h 54m

$300

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Sat 1/18

6:00 pm-11:47 pm

1 stop8h 47m

Ontario

Thu 1/23

7:00 am-9:59 pm

2 stops11h 59m

$336

Washington, D.C.Ontario

IAD - ONT

IADONT

Washington, D.C. Dulles Intl

Wed 12/11

6:55 am-12:25 pm

1 stop8h 30m

Ontario

Sat 1/11

7:00 am-5:02 pm

1 stop7h 02m

$336

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Wed 12/11

6:00 am-11:01 am

1 stop8h 01m

Ontario

Tue 1/7

6:00 am-6:57 pm

2 stops9h 57m

$341

Washington, D.C.Ontario

IAD - ONT

IADONT

Washington, D.C. Dulles Intl

Sat 2/8

6:10 am-3:29 pm

2 stops12h 19m

Ontario

Tue 2/11

6:00 am-7:35 pm

2 stops10h 35m

$346

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Wed 12/11

4:41 pm-11:02 pm

1 stop9h 21m

Ontario

Tue 1/7

1:21 pm-11:34 pm

1 stop7h 13m

$346

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

Thu 1/9

6:55 am-12:26 pm

1 stop8h 31m

Ontario

Wed 1/15

1:00 pm-12:49 am

1 stop8h 49m

$353

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Wed 1/1

6:00 am-1:58 pm

1 stop10h 58m

Ontario

Tue 1/7

10:00 am-12:32 am

2 stops11h 32m

$356

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/20

Showing 1-10 of 48 results
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Best time to book a flight from Maryland to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Maryland 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 Maryland to Ontario

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

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

Currently, September is the cheapest month in which you can book a flight from Maryland to Ontario (average of $236). Flying from Maryland to Ontario in December is currently the most expensive (average of $298). 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 MD to ONT?

Find hourly flight availability from Maryland to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 21, 2024.

When flying from Maryland to Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Ontario by month

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

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

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

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated November 21, 2024.
Get a feel of what it's like to fly with Frontier, Delta and American Airlines from Maryland to Ontario by reading reviews from past customers. 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
5,015 reviews

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.2

Entertainment

7.7

Crew

8.7

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Southwest
8.1
Very good
5,015 reviews
Southwest
8.1
Very good
5,015 reviews

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.2

Entertainment

7.7

Crew

8.7

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Alaska Airlines
8.0
Very good
9,458 reviews
Southwest
8.1
Very good
5,015 reviews

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.2

Entertainment

7.7

Crew

8.7

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Delta
8.0
Very good
8,758 reviews
Southwest
8.1
Very good
5,015 reviews

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.2

Entertainment

7.7

Crew

8.7

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

United Airlines
7.4
Good
9,172 reviews
Southwest
8.1
Very good
5,015 reviews

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.2

Entertainment

7.7

Crew

8.7

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
5,015 reviews

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.2

Entertainment

7.7

Crew

8.7

Reviews

1 / 10

No issues. I needed pre boarding and I was able to get it without issue

Related info for your journey

Find useful and relevant information for your journey from Maryland to Ontario. 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 into for flights to Ontario from Maryland?

    Most people fly into Ontario (ONT) if they book a flight to Ontario from Maryland. Ontario is conveniently located just 3.1 mi from Ontario’s city center.

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

    The cheapest airlines for a one-way flight from Maryland to Ontario are Frontier ($70), American Airlines ($147), and Delta ($167).

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

    When deciding which route to take from Maryland to Ontario consider Washington, D.C. Reagan-National - Ontario, Washington, D.C. Dulles Intl - Ontario or Baltimore/Washington - Ontario as they are the most popular.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Maryland to Ontario 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 Maryland to Ontario?

    Currently, September is the cheapest month in which you can book a flight from Maryland to Ontario (average of $236). Flying from Maryland to Ontario in December is currently the most expensive (average of $298). 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 Maryland to Ontario

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

Discover the top 6 airlines that operate flights from Maryland to Ontario. 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 21, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$154Average$249FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$154Average$285FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$257Average$564FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$260Average$431FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$294Average$514FlexibilityNo cancel feeOn-time71%
DeltaCheapest$296Average$446FlexibilityNo cancel feeOn-timeN/A
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