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$65+ Cheap flights from Ontario to Baltimore (ONT - BWI)

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 4/12. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BWI
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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The best prices from Ontario to Baltimore/Washington are usually found in August or September, booked 57 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from Ontario to Baltimore

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Baltimore (BWI). 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 January 21, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$128
(Cheapflightsfares)

One-way from

$65
(Cheapflightsfares)

Popular in

June

Cheapest in

August

Average price

$418
Provider with most accurate pricing for Ontario-Baltimore/Washington flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Baltimore/Washington flights.
Search Deals
From Ontario to Baltimore/Washington
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One-way flight from Ontario to Baltimore/Washington
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($60 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in January 2025
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Find flight deals from Ontario to Baltimore

Cheapest flights from Ontario to Baltimore
Explore the most affordable flight options available from Ontario to Baltimore. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 1/21. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/128:39 amONT - BWI
1 stop7h 45mFrontier
Thu 4/1712:05 pmBWI - ONT
1 stop8h 08mFrontier
Deal found 1/21$128
This Delta deal was found by Cheapflights users on 1/21. 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.
Sat 3/17:05 amONT - BWI
1 stop7h 29mDelta
Tue 3/44:47 pmBWI - ONT
1 stop9h 05mDelta
Deal found 1/21$327
This Southwest deal was found by Cheapflights users on 1/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/510:50 amONT - BWI
1 stop10h 30mSouthwest
Tue 4/86:30 pmBWI - ONT
1 stop7h 20mSouthwest
Deal found 1/20$362
This Alaska Airlines deal was found by Cheapflights users on 1/20. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/66:00 amONT - BWI
1 stop8h 59mAlaska Airlines
Mon 2/106:59 pmBWI - ONT
1 stop18h 39mAlaska Airlines
Deal found 1/20$385
This American Airlines deal was found by Cheapflights users on 1/20. 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 2/2310:50 pmONT - BWI
1 stop6h 43mAmerican Airlines
Wed 2/266:03 amBWI - ONT
1 stop10h 55mAmerican Airlines
Deal found 1/20$394
This United Airlines deal was found by Cheapflights users on 1/21. 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.
Sat 4/126:05 amONT - BWI
1 stop7h 02mUnited Airlines
Sun 4/206:30 amBWI - ONT
2 stops11h 47mUnited Airlines
Deal found 1/21$402

Find flights from Ontario to Baltimore within your budget

Customize your flight search to find flights from Ontario to Baltimore 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 January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Sat 4/12

8:39 am-7:24 pm

1 stop7h 45m

Baltimore/Washington

Thu 4/17

12:05 pm-5:13 pm

1 stop8h 08m

$128

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Sat 3/1

7:05 am-5:34 pm

1 stop7h 29m

Baltimore/Washington

Tue 3/4

4:47 pm-10:52 pm

1 stop9h 05m

$327

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Sat 4/5

10:50 am-12:20 am

1 stop10h 30m

Baltimore/Washington

Tue 4/8

6:30 pm-10:50 pm

1 stop7h 20m

$362

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Thu 2/6

6:00 am-5:59 pm

1 stop8h 59m

Baltimore/Washington

Mon 2/10

6:59 pm-10:38 am

1 stop18h 39m

$385

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Sun 2/23

10:50 pm-8:33 am

1 stop6h 43m

Baltimore/Washington

Wed 2/26

6:03 am-1:58 pm

1 stop10h 55m

$394

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Sat 4/12

6:05 am-4:07 pm

1 stop7h 02m

Baltimore/Washington

Sun 4/20

6:30 am-3:17 pm

2 stops11h 47m

$402

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Sat 4/12

8:39 am-7:24 pm

1 stop7h 45m

$65

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Thu 1/30

7:56 am-5:00 am

1 stop18h 04m

$137

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Wed 2/5

6:00 am-5:59 pm

1 stop8h 59m

$163

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Tue 2/11

7:05 am-6:12 pm

1 stop8h 07m

$164

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Showing 1-10 of 13 results
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Compare providers for flights from Ontario to Baltimore

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Baltimore in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Baltimore flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Baltimore flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Baltimore flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Baltimore flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Baltimore flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ontario to Baltimore

Have a flexible travel schedule? Discover the best time to fly to Baltimore 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 Baltimore

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

How far ahead should I book a flight from Ontario to Baltimore?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Baltimore. Price data was last updated on January 17, 2025.

The best time to book flights from Ontario to Baltimore is 57 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, August is the cheapest month in which you can book a flight from Ontario to Baltimore (average of $241). Flying from Ontario to Baltimore 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 BWI?

Find hourly flight availability from Ontario to Baltimore. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 21, 2025.

One of the essential ways to save on airfare from Ontario to Baltimore is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 16% on airfare.

What is the cheapest day to fly from Ontario to Baltimore?

Use this chart to determine the cheapest time to fly round-trip from Ontario to Baltimore. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Ontario to Baltimore flight should consider departing on Friday evenings when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Baltimore by month

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

In terms of precipitation, rainfall in Baltimore 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 Baltimore when rainfall is around 2.9 in.

Temperature in Baltimore by month

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

If weather is an important factor for your trip to Baltimore, 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 Baltimore

Get insights into the airlines that provide service to Baltimore. 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 Baltimore. Reviews last updated January 21, 2025.
See what other customers who have flown with Delta, Southwest and Alaska Airlines from Ontario to Baltimore have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Boarding

8.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Southwest
8.1
Very good
4,662 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Boarding

8.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Alaska Airlines
8.0
Very good
9,706 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Boarding

8.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Delta
8.0
Very good
8,521 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Boarding

8.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

United Airlines
7.4
Good
8,985 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Boarding

8.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Boarding

8.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Related info for your journey

Find useful and relevant information for your journey from Ontario to Baltimore. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Ontario to Baltimore round-trip?

    Our cheapest airline available from Ontario to Baltimore is Frontier. Our recent data shows that you can find tickets from as low as $128 on this airline. Additional options worth looking into are Delta and Southwest, starting at $327 and $362 round-trip. These flights start at 71% lower than the current average price 3 months from now.

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

    $65 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Alaska Airlines and Delta, with prices starting from $163 and $164, respectively.

  • What are the cheapest flights from Ontario to Baltimore?

    Looking for the cheapest flight from Ontario to Baltimore? While on average our users pay $773, our data indicates the cheapest price to be $649. The most popular route (Ontario - Baltimore/Washington), is priced around $128.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Ontario to Baltimore (average of $241). Flying from Ontario to Baltimore 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.

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Top 6 airlines flying from Ontario to Baltimore

Discover the top 6 airlines that operate flights from Ontario to Baltimore. 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 January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$148Average$273FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$151Average$251FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$256Average$544FlexibilityNo cancel feeOn-time69%
DeltaCheapest$296Average$511FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$301Average$462FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$332Average$557FlexibilityNo cancel feeOn-time71%
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