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$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 5/30. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BWI
may. 6 — may. 131
mar. 5/6
mar. 5/13
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 mayo 1, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$196
(Cheapflightsfares)

One-way from

$94
(Trip.com)

Popular in

December

Cheapest in

August

Average price

$336

Good round-trip deal

$372 or less

Good one-way deal

$171 or less
Provider with most accurate pricing for Los Angeles-Washington, D.C. (WAS) flight deals.
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Provider most trusted by Cheapflights users for Los Angeles-Washington, D.C. (WAS) flights.
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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 ($40 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 May 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 mayo 1, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 4/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 5/287:37 pmONT - PHL
1 stop7h 01mFrontier
mar. 6/36:15 amPHL - ONT
1 stop7h 28mFrontier
Deal found 4/30$196
This Frontier deal was found by Cheapflights users on 4/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 5/512:59 amONT - DCA
1 stop8h 08mFrontier
mar. 5/131:00 pmDCA - ONT
1 stop13h 59mFrontier
Deal found 4/30$198
This Frontier deal was found by Cheapflights users on 4/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 5/245:15 pmONT - IAD
1 stop9h 40mFrontier
sáb. 5/317:25 amIAD - ONT
1 stop11h 55mFrontier
Deal found 4/30$198
This Frontier deal was found by Cheapflights users on 4/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 5/3012:59 amONT - BWI
1 stop12h 54mFrontier
lun. 6/25:20 pmBWI - ONT
1 stop9h 30mFrontier
Deal found 4/30$208
This Alaska Airlines deal was found by Cheapflights users on 4/29. 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.
mié. 5/2811:51 amONT - IAD
1 stop9h 08mAlaska Airlines
mar. 6/39:00 amIAD - ONT
1 stop9h 50mAlaska Airlines
Deal found 4/29$292
This Orbitz deal was found by Cheapflights users on 5/1. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 6/67:20 pmONT - IAD
1 stop9h 16mMultiple Airlines
dom. 6/811:09 amIAD - ONT
1 stop11h 03mMultiple Airlines
Deal found 5/1$303
This Delta deal was found by Cheapflights users on 4/30. 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.
mié. 7/26:00 amONT - PHL
1 stop8h 20mDelta
mar. 7/84:05 pmPHL - ONT
1 stop9h 22mDelta
Deal found 4/30$307
This Orbitz deal was found by Cheapflights users on 4/29. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 6/24:45 pmONT - BWI
1 stop10h 44mMultiple Airlines
vie. 6/65:20 pmBWI - ONT
1 stop9h 30mMultiple Airlines
Deal found 4/29$313
This Delta deal was found by Cheapflights users on 4/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 5/277:05 pmONT - BWI
2 stops12h 22mDelta
mar. 6/36:55 amBWI - ONT
2 stops14h 25mDelta
Deal found 4/29$324
This Hawaiian Airlines deal was found by Cheapflights users on 4/29. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 5/2811:51 amONT - IAD
1 stop9h 08mHawaiian Airlines
mié. 6/49:00 amIAD - ONT
1 stop9h 50mHawaiian Airlines
Deal found 4/29$326
This United Airlines deal was found by Cheapflights users on 4/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 6/106:00 amONT - DCA
1 stop9h 55mUnited Airlines
lun. 6/166:00 pmDCA - ONT
1 stop7h 26mUnited Airlines
Deal found 4/30$327
This Delta deal was found by Cheapflights users on 4/30. 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.
mar. 6/1010:05 pmONT - IAD
1 stop8h 07mDelta
mar. 6/173:31 pmIAD - ONT
1 stop9h 54mDelta
Deal found 4/30$327

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 mayo 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

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

mié. 5/28

7:37 pm-5:38 am

1 stop7h 01m

Philadelphia

mar. 6/3

6:15 am-10:43 am

1 stop7h 28m

$196

OntarioWashington, D.C.

ONT - DCA

ONTDCA

Ontario

mar. 5/13

12:59 am-12:07 pm

1 stop8h 08m

Washington, D.C. Reagan-National

mar. 5/20

1:00 pm-11:59 pm

1 stop13h 59m

$198

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

sáb. 5/24

5:15 pm-5:55 am

1 stop9h 40m

Washington, D.C. Dulles Intl

mié. 5/28

7:25 am-11:43 am

1 stop7h 18m

$198

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

vie. 5/30

12:59 am-4:53 pm

1 stop12h 54m

Baltimore/Washington

mié. 6/4

5:20 pm-9:12 am

1 stop18h 52m

$208

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

mié. 5/28

7:37 pm-5:55 am

1 stop7h 18m

Washington, D.C. Dulles Intl

mié. 6/4

9:00 am-3:50 pm

1 stop9h 50m

$267

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

mié. 5/28

11:51 am-11:59 pm

1 stop9h 08m

Washington, D.C. Dulles Intl

mar. 6/3

9:00 am-3:50 pm

1 stop9h 50m

$292

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

mié. 7/2

6:00 am-5:20 pm

1 stop8h 20m

Philadelphia

mar. 7/8

4:05 pm-10:27 pm

1 stop9h 22m

$307

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

lun. 6/2

4:45 pm-6:29 am

1 stop10h 44m

Baltimore/Washington

vie. 6/6

5:20 pm-11:50 pm

1 stop9h 30m

$313

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

mar. 5/27

7:05 pm-10:27 am

2 stops12h 22m

Baltimore/Washington

mar. 6/3

6:55 am-6:20 pm

2 stops14h 25m

$324

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

mié. 5/28

11:51 am-11:59 pm

1 stop9h 08m

Washington, D.C. Dulles Intl

mié. 6/4

9:00 am-3:50 pm

1 stop9h 50m

$326

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 59 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 mayo 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.

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 mayo 1, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest 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.
Alaska Airlines
8.0
Very good
9,972 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.1

Crew

8.5

Comfort

7.9

Food

7.1

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
9,972 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.1

Crew

8.5

Comfort

7.9

Food

7.1

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
4,294 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.1

Crew

8.5

Comfort

7.9

Food

7.1

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
7,934 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.1

Crew

8.5

Comfort

7.9

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,408 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.1

Crew

8.5

Comfort

7.9

Food

7.1

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
8,696 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.1

Crew

8.5

Comfort

7.9

Food

7.1

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.

  • 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 $94. Users have also found prices from $138 and $154 on Alaska 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. Dulles Intl, Ontario - Baltimore/Washington 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 $123. On average you can expect to pay $294. The most popular route, (Ontario - Washington, D.C. Dulles Intl), can usually be booked for $208.

  • 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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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 2,558,603 searches. Data last updated mayo 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$121Average$183FlexibilityNo cancel feeOn-time65%
FrontierCheapest$148Average$248FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$256Average$470FlexibilityNo cancel feeOn-time69%
DeltaCheapest$296Average$452FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$311Average$582FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$326Average$441FlexibilityNo cancel feeOn-time63%

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