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$62+ Cheap flights from Baltimore to Ontario (BWI - 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 4/2. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — ONT
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
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The best prices from Baltimore/Washington to Ontario are usually found in September or August, booked 3 days in advance, depart on a Friday or Thursday and return on a Tuesday

Cheap flight deals from Baltimore to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Baltimore (BWI) 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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$127
(Cheapflightsfares)

One-way from

$62
(Trip.com)

Popular in

June

Cheapest in

September

Average price

$428
Provider with most accurate pricing for Baltimore/Washington-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Baltimore/Washington-Ontario flights.
Search Deals
From Baltimore/Washington to Ontario
Search Deals
One-way flight from Baltimore/Washington to Ontario
Search Deals
Highest demand for flights based on searches. 0% potential increase in price ($0 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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Find flight deals from Baltimore to Ontario

Cheapest flights from Baltimore to Ontario
Explore the most affordable flight options available from Baltimore to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 2/20. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/312:05 pmBWI - ONT
1 stop8h 08mFrontier
Sun 4/612:59 amONT - BWI
1 stop7h 28mFrontier
Deal found 2/20$128
This Delta deal was found by Cheapflights users on 2/20. 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.
Tue 3/1812:28 pmBWI - ONT
2 stops12h 54mDelta
Mon 3/245:30 pmONT - BWI
2 stops15h 03mDelta
Deal found 2/20$304
This Southwest deal was found by Cheapflights users on 2/20. 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.
Wed 3/123:55 pmBWI - ONT
1 stop10h 00mSouthwest
Mon 3/246:05 pmONT - BWI
1 stop8h 45mSouthwest
Deal found 2/20$327
This American Airlines deal was found by Cheapflights users on 2/20. 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 3/64:53 pmBWI - ONT
2 stops10h 00mAmerican Airlines
Mon 3/107:35 pmONT - BWI
2 stops10h 55mAmerican Airlines
Deal found 2/20$337
This Alaska Airlines deal was found by Cheapflights users on 2/19. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/227:06 amBWI - ONT
1 stop11h 26mAlaska Airlines
Wed 4/304:29 pmONT - BWI
1 stop10h 17mAlaska Airlines
Deal found 2/19$362
This United Airlines deal was found by Cheapflights users on 2/20. 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 4/24:21 pmBWI - ONT
1 stop8h 37mUnited Airlines
Thu 4/33:55 pmONT - BWI
2 stops10h 29mUnited Airlines
Deal found 2/20$433
This Mytrip deal was found by Cheapflights users on 2/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/63:13 pmBWI - ONT
3 stops35h 46mMultiple Airlines
Sun 4/137:00 amONT - BWI
2 stops19h 46mMultiple Airlines
Deal found 2/20$441

Find flights from Baltimore to Ontario within your budget

Customize your flight search to find flights from Baltimore 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 February 20, 2025.

Fly from

Baltimore

Fly to

Ontario

Route

Depart

Return

Price

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Thu 4/3

12:05 pm-5:13 pm

1 stop8h 08m

Ontario

Sun 4/6

12:59 am-11:27 am

1 stop7h 28m

$128

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Tue 3/18

12:28 pm-10:22 pm

2 stops12h 54m

Ontario

Mon 3/24

5:30 pm-11:33 am

2 stops15h 03m

$304

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Wed 3/12

3:55 pm-10:55 pm

1 stop10h 00m

Ontario

Mon 3/24

6:05 pm-5:50 am

1 stop8h 45m

$327

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Thu 3/6

4:53 pm-11:53 pm

2 stops10h 00m

Ontario

Mon 3/10

7:35 pm-9:30 am

2 stops10h 55m

$337

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Tue 4/22

7:06 am-3:32 pm

1 stop11h 26m

Ontario

Wed 4/30

4:29 pm-5:46 am

1 stop10h 17m

$362

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Tue 3/11

8:00 am-12:44 pm

1 stop7h 44m

Ontario

Wed 3/12

1:40 pm-11:27 pm

1 stop6h 47m

$428

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Sun 4/6

3:13 pm-11:59 pm

3 stops35h 46m

Ontario

Sun 4/13

7:00 am-5:46 am

2 stops19h 46m

$441

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Thu 4/3

12:05 pm-5:13 pm

1 stop8h 08m

$65

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Mon 4/21

6:00 am-1:55 pm

2 stops10h 55m

$142

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Tue 6/17

12:25 pm-11:59 pm

2 stops14h 34m

$158

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 15 results
1
2

Compare providers for flights from Baltimore to Ontario

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 Baltimore to Ontario in February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star

*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 Baltimore-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Baltimore-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Baltimore-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Baltimore-Ontario 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 Baltimore-Ontario 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 Baltimore to Ontario

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

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

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

Use this chart to determine the optimal time to book a round-trip flight from Baltimore to Ontario. Price data was last updated on February 14, 2025.

The price you pay for your flight from Baltimore to Ontario may vary depending on when you book. For the best chance of a lower fare, look to book 3 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, August is the cheapest month in which you can book a flight from Baltimore to Ontario (average of $246). Flying from Baltimore to Ontario in March is currently the most expensive (average of $315). 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 BWI to ONT?

Find hourly flight availability from Baltimore 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 February 20, 2025.

It’s typically best to fly out from Baltimore to Ontario in the morning. Doing so could potentially save you 36% on the flight price compared to flying in the afternoon, which is usually more expensive.

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

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

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

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 February 20, 2025.
See what other customers who have flown with Southwest, Alaska Airlines and Delta from Baltimore to Ontario 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
4,411 reviews

Food

7.1

Boarding

8.2

Comfort

8.1

Overall

8.1

Crew

8.7

Entertainment

7.6

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

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

Southwest
8.1
Very good
4,411 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Boarding

8.2

Comfort

8.1

Overall

8.1

Crew

8.7

Entertainment

7.6

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

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

Alaska Airlines
8.0
Very good
9,697 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Boarding

8.2

Comfort

8.1

Overall

8.1

Crew

8.7

Entertainment

7.6

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

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

Delta
8.0
Very good
8,219 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Boarding

8.2

Comfort

8.1

Overall

8.1

Crew

8.7

Entertainment

7.6

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

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

Hawaiian Airlines
7.9
Good
2,317 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Boarding

8.2

Comfort

8.1

Overall

8.1

Crew

8.7

Entertainment

7.6

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

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

United Airlines
7.4
Good
8,765 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Boarding

8.2

Comfort

8.1

Overall

8.1

Crew

8.7

Entertainment

7.6

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

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 Baltimore to Ontario. 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 Baltimore to Ontario round-trip?

    Cheapflights users have booked flights from Baltimore to Ontario round-trip from $127. Other airlines that can offer you cheap pricing are Delta, from $304, and Southwest, from $332. Frontier is priced at 71% lower than the current average price of a flight leaving 3 months from now.

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

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $62. Delta flights start at $152 while deals on American Airlines start at $163 one-way.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Baltimore to Ontario (average of $246). Flying from Baltimore to Ontario in March is currently the most expensive (average of $315). 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 Baltimore to Ontario

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Top 5 airlines flying from Baltimore to Ontario

Discover the top 5 airlines that operate flights from Baltimore 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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$154Average$248FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$286Average$526FlexibilityNo cancel feeOn-time69%
DeltaCheapest$306Average$458FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$321Average$538FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$326Average$468FlexibilityNo cancel feeOn-time63%
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