How popular is this Ontario to Baltimore flight route?

This flight path from Ontario to Baltimore/Washington was viewed by 6 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

How long is the flight from Ontario to Baltimore?

Airlines like Southwest, Delta, and Alaska Airlines fly from Ontario to Baltimore in about 7h 11m. The time it takes to get you to your destination can typically vary by up to 2h 05m. The distance from Ontario to Baltimore is about 2276 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

Our cheapest airline available from Ontario to Baltimore is Spirit Airlines. Our recent data shows that you can find tickets from as low as $98 on this airline. Additional options worth looking into are Frontier and United Airlines, starting at $168 and $256 round-trip. These flights start at 78% lower than the current average price 3 months from now.

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

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

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.

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).

What are the cheapest flights from Ontario to Baltimore?

Looking for the cheapest flight from Ontario to Baltimore? While on average our users pay $351, our data indicates the cheapest price to be $159. The most popular route (Ontario - Baltimore/Washington), is priced around $175.

What are the most popular airlines that fly from Ontario to Baltimore?

Southwest, Delta and American Airlines are the most popular airlines when flying from Ontario to Baltimore.

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.

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.

$72+ Cheap Flights from Ontario to Baltimore

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from Ontario to Baltimore with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Ontario to Baltimore/Washington are usually found in May or September, booked 70 days in advance, depart on a Thursday or Tuesday and return on a Friday

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 October 16, 2025.

Fri 11/141:46 pmONT - BWI

1 stop17h 38mMultiple Airlines

Wed 11/1910:22 amBWI - ONT

2 stops31h 04mMultiple Airlines

Deal found 10/16

$169

Thu 11/1310:05 amONT - BWI

1 stop15h 50mMultiple Airlines

Sun 11/166:00 amBWI - ONT

1 stop28h 17mMultiple Airlines

Deal found 10/15

$170

Sat 11/86:53 amONT - BWI

2 stops14h 09mMultiple Airlines

Mon 11/176:00 amBWI - ONT

1 stop9h 51mMultiple Airlines

Deal found 10/15

$175

Fri 11/71:46 pmONT - BWI

1 stop17h 38mMultiple Airlines

Mon 11/106:00 amBWI - ONT

1 stop9h 51mMultiple Airlines

Deal found 10/16

$192

Tue 12/96:30 amONT - BWI

2 stops23h 47mMultiple Airlines

Thu 12/1111:29 amBWI - ONT

1 stop9h 26mMultiple Airlines

Deal found 10/14

$200

Fri 11/141:46 pmONT - BWI

1 stop23h 04mMultiple Airlines

Mon 11/245:45 amBWI - ONT

1 stop11h 41mMultiple Airlines

Deal found 10/16

$207

Thu 12/46:50 pmONT - BWI

1 stop12h 41mFrontier

Mon 12/811:29 amBWI - ONT

1 stop9h 26mFrontier

Deal found 10/16

$210

Thu 11/136:00 amONT - BWI

1 stop19h 55mMultiple Airlines

Mon 11/245:45 amBWI - ONT

1 stop11h 41mMultiple Airlines

Deal found 10/15

$212

Sat 11/16:53 amONT - BWI

2 stops14h 09mMultiple Airlines

Wed 11/56:24 pmBWI - ONT

1 stop27h 25mMultiple Airlines

Deal found 10/15

$218

Best flights from Ontario to Baltimore
Discover carefully curated flight deals from Ontario to Baltimore that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 16, 2025.

Thu 11/2010:30 amONT - BWI

1 stop7h 45mSouthwest

Sat 11/226:05 pmBWI - ONT

1 stop8h 50mSouthwest

Deal found 10/14

$347

Tue 11/187:05 amONT - BWI

1 stop7h 11mDelta

Fri 11/217:15 amBWI - ONT

1 stop8h 03mDelta

Deal found 10/14

$363

Wed 11/56:00 amONT - BWI

1 stop9h 16mAlaska Airlines

Wed 11/127:38 amBWI - ONT

1 stop10h 39mAlaska Airlines

Deal found 10/15

$367

Fri 11/76:38 pmONT - BWI

1 stop8h 02mUnited Airlines

Tue 11/118:15 amBWI - ONT

1 stop7h 16mUnited Airlines

Deal found 10/15

$367

Fri 12/128:25 amONT - BWI

2 stops9h 50mSouthwest

Sun 12/146:15 amBWI - ONT

2 stops10h 55mSouthwest

Deal found 10/15

$357

Sat 1/311:59 pmONT - BWI

1 stop6h 49mUnited Airlines

Sat 1/1010:05 amBWI - ONT

2 stops13h 53mUnited Airlines

Deal found 10/15

$368

Mon 11/106:00 amONT - BWI

1 stop9h 16mAlaska Airlines

Sat 11/157:38 amBWI - ONT

1 stop10h 39mAlaska Airlines

Deal found 10/16

$372

Thu 12/256:00 amONT - BWI

1 stop9h 00mAlaska Airlines

Wed 12/317:04 amBWI - ONT

1 stop11h 38mAlaska Airlines

Deal found 10/15

$372

Fri 11/76:38 pmONT - BWI

2 stops12h 21mUnited Airlines

Mon 11/106:15 amBWI - ONT

2 stops9h 18mUnited Airlines

Deal found 10/15

$377

Sat 11/83:25 pmONT - BWI

1 stop11h 20mSouthwest

Tue 11/116:15 amBWI - ONT

2 stops11h 25mSouthwest

Deal found 10/15

$378

Wed 11/126:00 amONT - BWI

1 stop9h 16mAlaska Airlines

Sat 11/157:38 amBWI - ONT

1 stop10h 39mAlaska Airlines

Deal found 10/16

$372

Thu 11/1310:50 amONT - BWI

Nonstop4h 45mSouthwest

Mon 11/246:35 amBWI - ONT

1 stop8h 55mSouthwest

Deal found 10/15

$382

Last-minute flights from Ontario to Baltimore
Discover last-minute flight deals from Ontario to Baltimore. Data last updated October 16, 2025 and is based on user searches.

Sat 11/16:53 amONT - BWI

2 stops14h 09mMultiple Airlines

Wed 11/56:24 pmBWI - ONT

1 stop27h 25mMultiple Airlines

Deal found 10/15

$218

Fri 11/71:46 pmONT - BWI

1 stop17h 38mMultiple Airlines

Mon 11/106:00 amBWI - ONT

1 stop9h 51mMultiple Airlines

Deal found 10/16

$192

Fri 11/77:23 pmONT - BWI

1 stop15h 47mMultiple Airlines

Sun 11/96:00 amBWI - ONT

1 stop28h 17mMultiple Airlines

Deal found 10/15

$225

Sat 11/86:53 amONT - BWI

2 stops14h 09mMultiple Airlines

Mon 11/176:00 amBWI - ONT

1 stop9h 51mMultiple Airlines

Deal found 10/15

$175

Thu 11/1310:05 amONT - BWI

1 stop15h 50mMultiple Airlines

Sun 11/166:00 amBWI - ONT

1 stop28h 17mMultiple Airlines

Deal found 10/15

$170

Thu 11/136:00 amONT - BWI

1 stop19h 55mMultiple Airlines

Mon 11/245:45 amBWI - ONT

1 stop11h 41mMultiple Airlines

Deal found 10/15

$212

Fri 11/141:46 pmONT - BWI

1 stop17h 38mMultiple Airlines

Wed 11/1910:22 amBWI - ONT

2 stops31h 04mMultiple Airlines

Deal found 10/16

$169

Fri 11/141:46 pmONT - BWI

1 stop23h 04mMultiple Airlines

Mon 11/245:45 amBWI - ONT

1 stop11h 41mMultiple Airlines

Deal found 10/16

$207

One-way flights from Ontario to Baltimore
Search for one-way flight options from Ontario to Baltimore. Find affordable one-way fares based on user searches. Data last updated October 16, 2025.

Mon 12/82:59 pmONT - BWI

1 stop15h 18mMultiple Airlines

Deal found 10/16

$72

Fri 12/52:05 pmONT - BWI

1 stop16h 12mMultiple Airlines

Deal found 10/16

$73

Fri 11/141:46 pmONT - BWI

1 stop23h 04mMultiple Airlines

Deal found 10/16

$78

Thu 11/136:00 amONT - BWI

1 stop19h 55mMultiple Airlines

Deal found 10/15

$80

Thu 11/136:00 amONT - BWI

2 stops15h 07mFrontier

Deal found 10/15

$85

Fri 10/318:24 amONT - BWI

1 stop26h 46mFrontier

Deal found 10/16

$93

Mon 11/101:46 pmONT - BWI

2 stops44h 09mMultiple Airlines

Deal found 10/13

$94

Thu 12/116:50 pmONT - BWI

1 stop12h 41mFrontier

Deal found 10/15

$96

Wed 11/128:45 amONT - BWI

2 stops20h 33mFrontier

Deal found 10/15

$98

Sat 11/156:53 amONT - BWI

2 stops14h 09mFrontier

Deal found 10/15

$99

Cheap flight deals from Ontario to Baltimore

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$169 (Kiwi.com)
One-way from	$72 (Trip.com)
Popular in	November
Cheapest in	May
Average price	$461

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

Search Deals

One-way flight from Ontario to Baltimore/Washington

Search Deals

Highest demand for flights based on searches. 5% potential increase in price ($24 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in October 2025

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Thu 11/20

10:30 am-9:15 pm

1 stop7h 45m

Baltimore/Washington

Sat 11/22

6:05 pm-11:55 pm

1 stop8h 50m

$347

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Fri 12/12

8:25 am-9:15 pm

2 stops9h 50m

Baltimore/Washington

Sun 12/14

6:15 am-2:10 pm

2 stops10h 55m

$357

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Tue 11/18

7:05 am-5:16 pm

1 stop7h 11m

Baltimore/Washington

Fri 11/21

7:15 am-12:18 pm

1 stop8h 03m

$363

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Wed 11/5

6:00 am-6:16 pm

1 stop9h 16m

Baltimore/Washington

Wed 11/12

7:38 am-3:17 pm

1 stop10h 39m

$367

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Fri 11/7

6:38 pm-5:40 am

1 stop8h 02m

Baltimore/Washington

Tue 11/11

8:15 am-12:31 pm

1 stop7h 16m

$367

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Sat 1/3

11:59 pm-9:48 am

1 stop6h 49m

Baltimore/Washington

Sat 1/10

10:05 am-8:58 pm

2 stops13h 53m

$368

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Mon 11/10

6:00 am-6:16 pm

1 stop9h 16m

Baltimore/Washington

Sat 11/15

7:38 am-3:17 pm

1 stop10h 39m

$372

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Thu 12/25

6:00 am-6:00 pm

1 stop9h 00m

Baltimore/Washington

Wed 12/31

7:04 am-3:42 pm

1 stop11h 38m

$372

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Wed 11/12

6:00 am-6:16 pm

1 stop9h 16m

Baltimore/Washington

Sat 11/15

7:38 am-3:17 pm

1 stop10h 39m

$372

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Fri 11/7

6:38 pm-9:59 am

2 stops12h 21m

Baltimore/Washington

Mon 11/10

6:15 am-12:33 pm

2 stops9h 18m

$377

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/15

Showing 1-10 of 21 results

Compare providers for flights from Ontario to Baltimore

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Baltimore in October.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy2 stars	Trust Score*1 star
Priceline	Price Accuracy1 star	Trust 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.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Baltimore

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

The best time to book flights from Ontario to Baltimore is 70 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 $93). Flying from Ontario to Baltimore in December is currently the most expensive (average of $164). 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?

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 morning could potentially save you up to 18% on airfare.

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

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

Reviews of airlines servicing Baltimore

Read reviews from past customers who have flown Southwest, Delta, and United Airlines from Ontario to Baltimore. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,241 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Southwest

8.0

Very good

4,241 reviews

Southwest

8.0

Very good

4,241 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Delta

8.0

Very good

7,984 reviews

Southwest

8.0

Very good

4,241 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

United Airlines

7.4

Good

8,982 reviews

Southwest

8.0

Very good

4,241 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

American Airlines

7.2

Good

11,043 reviews

Southwest

8.0

Very good

4,241 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Frontier

5.8

Fair

3,137 reviews

Southwest

8.0

Very good

4,241 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Related info for your journey

How popular is this Ontario to Baltimore flight route?
This flight path from Ontario to Baltimore/Washington was viewed by 6 users in the past month. Keep an eye out for changes in search interest prior to high and low season.
How long is the flight from Ontario to Baltimore?
Airlines like Southwest, Delta, and Alaska Airlines fly from Ontario to Baltimore in about 7h 11m. The time it takes to get you to your destination can typically vary by up to 2h 05m. The distance from Ontario to Baltimore is about 2276 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.
What are the cheapest airlines flying from Ontario to Baltimore round-trip?
Our cheapest airline available from Ontario to Baltimore is Spirit Airlines. Our recent data shows that you can find tickets from as low as $98 on this airline. Additional options worth looking into are Frontier and United Airlines, starting at $168 and $256 round-trip. These flights start at 78% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from Ontario to Baltimore one-way?
$164 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on Alaska Airlines and Southwest, with prices starting from $164 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 $351, our data indicates the cheapest price to be $159. The most popular route (Ontario - Baltimore/Washington), is priced around $175.
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 $93). Flying from Ontario to Baltimore in December is currently the most expensive (average of $164). 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

Browse thousands of different options on Cheapflights for your next trip

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Top 6 airlines flying from Ontario to Baltimore

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$98	Average$212	FlexibilityNo cancel fee	On-time65%
Frontier	Cheapest$168	Average$240	FlexibilityNo cancel fee	On-time62%
United Airlines	Cheapest$256	Average$462	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$326	Average$449	FlexibilityNo cancel fee	On-timeN/A
Southwest	Cheapest$338	Average$466	FlexibilityNo cancel fee	On-time63%
American Airlines	Cheapest$346	Average$544	FlexibilityNo cancel fee	On-time71%

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$72+ 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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ontario to Baltimore with Cheapflights

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2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Ontario to Baltimore/Washington are usually found in May or September, booked 70 days in advance, depart on a Thursday or Tuesday and return on a Friday

Find flight deals from Ontario to Baltimore

Cheapest flights from Ontario to BaltimoreExplore 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 October 16, 2025.

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 October 16, 2025.

Cheap flight deals from Ontario to Baltimore

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to Baltimore that are best for you.

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 October.

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.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Baltimore

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

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

What is the cheapest time of day to fly from ONT to BWI?

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

Reviews of airlines servicing Baltimore

Read reviews from past customers who have flown Southwest, Delta, and United Airlines from Ontario to Baltimore. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

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.

How popular is this Ontario to Baltimore flight route?

How long is the flight from Ontario to Baltimore?

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

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

What are the cheapest flights from Ontario to Baltimore?

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

How can I find direct flights from Ontario to Baltimore?

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

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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ontario to Baltimore

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Top 6 airlines flying from Ontario to Baltimore

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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 October 16, 2025.