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Ontario

$63+ 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 2/13. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — ONT
Dec 27 — Jan 31
Fri 12/27
Fri 1/3
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 December 22, 2024.

Round-trip from

$126
(Flightnetwork)

One-way from

$63
(Mytrip)
From Maryland to Ontario
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One-way flight from Maryland to Ontario
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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 December 22, 2024.

This FlightHub deal was found by Cheapflights users on 12/21. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/316:00 pmDCA - ONT
1 stop8h 59mFrontier
Tue 1/77:45 amONT - DCA
1 stop11h 11mFrontier
Deal found 12/21$330
This Gotogate deal was found by Cheapflights users on 12/21. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/237:30 amPHL - ONT
1 stop26h 39mFrontier
Thu 1/236:45 amONT - PHL
1 stop11h 03mFrontier
Deal found 12/21$365
This Delta deal was found by Cheapflights users on 12/21. 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.
Tue 12/315:38 amPHL - ONT
1 stop8h 08mDelta
Tue 1/71:00 pmONT - PHL
1 stop6h 52mDelta
Deal found 12/21$457
This United Airlines deal was found by Cheapflights users on 12/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/316:35 amIAD - ONT
1 stop9h 05mUnited Airlines
Tue 1/71:43 pmONT - IAD
1 stop6h 47mUnited Airlines
Deal found 12/21$527
This United Airlines deal was found by Cheapflights users on 12/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/314:02 pmBWI - ONT
1 stop7h 47mUnited Airlines
Wed 1/85:10 amONT - BWI
1 stop6h 55mUnited Airlines
Deal found 12/21$537
This Gotogate deal was found by Cheapflights users on 12/21. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/272:16 pmBWI - ONT
1 stop9h 03mFrontier
Thu 1/212:59 amONT - BWI
1 stop9h 27mFrontier
Deal found 12/21$589
This Delta deal was found by Cheapflights users on 12/21. 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.
Sun 12/296:00 amBWI - ONT
1 stop7h 46mDelta
Wed 1/81:21 pmONT - BWI
1 stop7h 13mDelta
Deal found 12/21$591
This Delta deal was found by Cheapflights users on 12/20. 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 12/266:57 pmIAD - ONT
1 stop7h 44mDelta
Mon 1/61:00 pmONT - IAD
1 stop8h 22mDelta
Deal found 12/20$601
This Southwest deal was found by Cheapflights users on 12/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/315:45 pmIAD - ONT
1 stop7h 25mSouthwest
Sun 1/51:55 pmONT - IAD
1 stop8h 05mSouthwest
Deal found 12/21$652
This American Airlines deal was found by Cheapflights users on 12/20. 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.
Fri 12/276:30 amDCA - ONT
1 stop10h 28mAmerican Airlines
Sun 12/2912:36 pmONT - DCA
1 stop9h 14mAmerican Airlines
Deal found 12/20$674
This American Airlines deal was found by Cheapflights users on 12/20. 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.
Fri 12/276:21 amIAD - ONT
1 stop10h 37mAmerican Airlines
Sun 12/2912:36 pmONT - IAD
1 stop7h 03mAmerican Airlines
Deal found 12/20$674
This Delta deal was found by Cheapflights users on 12/21. 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.
Mon 12/306:50 pmDCA - ONT
1 stop7h 51mDelta
Wed 1/81:00 pmONT - DCA
1 stop7h 39mDelta
Deal found 12/21$677

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 2,558,603 searches. Data last updated December 22, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

Sat 2/15

8:00 am-7:09 pm

1 stop14h 09m

Ontario

Fri 2/21

12:59 am-6:39 pm

1 stop14h 40m

$126

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Sat 4/5

8:34 pm-7:39 am

1 stop14h 05m

Ontario

Tue 4/8

12:59 am-4:28 pm

1 stop12h 29m

$236

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Fri 1/24

1:01 pm-5:28 pm

1 stop7h 27m

Ontario

Mon 2/3

6:34 pm-12:06 pm

1 stop14h 32m

$281

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Wed 1/8

7:15 am-12:26 pm

1 stop8h 11m

Ontario

Wed 1/15

1:21 pm-11:34 pm

1 stop7h 13m

$336

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

Tue 1/7

6:55 am-12:26 pm

1 stop8h 31m

Ontario

Tue 1/14

1:00 pm-12:49 am

1 stop8h 49m

$336

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Wed 1/1

6:05 am-10:46 am

1 stop7h 41m

Ontario

Wed 1/8

1:00 pm-10:35 pm

1 stop6h 35m

$336

Washington, D.C.Ontario

IAD - ONT

IADONT

Washington, D.C. Dulles Intl

Sat 1/18

5:57 pm-10:52 pm

1 stop7h 55m

Ontario

Sat 1/25

1:21 pm-11:36 pm

1 stop7h 15m

$336

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Tue 2/4

8:59 am-1:51 pm

1 stop7h 52m

Ontario

Tue 2/11

6:10 am-5:59 pm

2 stops8h 49m

$341

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Sat 2/8

4:13 pm-8:51 pm

1 stop7h 38m

Ontario

Sat 2/15

6:00 am-3:53 pm

1 stop6h 53m

$342

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Wed 1/8

5:00 am-11:58 am

2 stops9h 58m

Ontario

Wed 1/15

10:00 am-12:18 am

2 stops11h 18m

$346

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/21

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, August is the cheapest month in which you can book a flight from Maryland to Ontario (average of $246). Flying from Maryland to Ontario in March is currently the most expensive (average of $317). 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 December 22, 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 December 22, 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
4,804 reviews

Overall

8.1

Crew

8.7

Entertainment

7.7

Food

7.2

Boarding

8.2

Comfort

8.1

Reviews

1 / 10

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

Southwest
8.1
Very good
4,804 reviews
Southwest
8.1
Very good
4,804 reviews

Overall

8.1

Crew

8.7

Entertainment

7.7

Food

7.2

Boarding

8.2

Comfort

8.1

Reviews

1 / 10

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

Alaska Airlines
8.0
Very good
9,537 reviews
Southwest
8.1
Very good
4,804 reviews

Overall

8.1

Crew

8.7

Entertainment

7.7

Food

7.2

Boarding

8.2

Comfort

8.1

Reviews

1 / 10

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

Delta
8.0
Very good
8,594 reviews
Southwest
8.1
Very good
4,804 reviews

Overall

8.1

Crew

8.7

Entertainment

7.7

Food

7.2

Boarding

8.2

Comfort

8.1

Reviews

1 / 10

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

United Airlines
7.4
Good
9,028 reviews
Southwest
8.1
Very good
4,804 reviews

Overall

8.1

Crew

8.7

Entertainment

7.7

Food

7.2

Boarding

8.2

Comfort

8.1

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
4,804 reviews

Overall

8.1

Crew

8.7

Entertainment

7.7

Food

7.2

Boarding

8.2

Comfort

8.1

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 ($63), Delta ($162), and American Airlines ($168).

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

    When deciding which route to take from Maryland to Ontario consider Baltimore/Washington - Ontario, Washington, D.C. Reagan-National - Ontario or Washington, D.C. Dulles Intl - 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, August is the cheapest month in which you can book a flight from Maryland to Ontario (average of $246). Flying from Maryland to Ontario in March is currently the most expensive (average of $317). 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 2,558,603 searches. Data last updated December 22, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$154Average$248FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$154Average$229FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$257Average$536FlexibilityNo cancel feeOn-time69%
DeltaCheapest$296Average$446FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$306Average$538FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$326Average$441FlexibilityNo cancel feeOn-time63%
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