Which layover airport has the shortest travel time from Baltimore to Ontario?

Flights connecting via Las Vegas (LAS) have the shortest average one-way travel time: 7h 20m.

Which airport is the most popular layover for flights between Baltimore and Ontario?

Atlanta (ATL) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport has the shortest connection time from Baltimore to Ontario?

Las Vegas (LAS) has the shortest average layover time for this route: 1h 05m.

What is the cheapest airline that flies from Baltimore/Washington to Ontario?

Delta, United Airlines, and American Airlines are the most popular carriers operating from Baltimore/Washington to Ontario

What airlines fly to Ontario?

United Airlines, Southwest and American Airlines are the top three most popular airlines that fly to Ontario from Baltimore according to our data. United Airlines is the first choice among our users, with 55% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 8 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

Which layover airport offers the lowest fares from Baltimore to Ontario?

Flights via Denver (DEN) offer the lowest average round-trip price of $236.

When did momondo last update prices for flights from Baltimore/Washington Airport to Ontario Airport?

Prices for flights from Baltimore/Washington Airport to Ontario Airport refresh daily.

How many operators does momondo search for flights from Baltimore/Washington Airport to Ontario Airport?

As of August 2026, there are 5 operators available to choose from for flights from Baltimore/Washington Airport to Ontario Airport.

How old do you have to be to fly from Baltimore/Washington Airport to Ontario Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Baltimore/Washington Airport to Ontario Airport.

What documentation or ID do you need to fly to Ontario Airport?

The necessary travel and health documents for your Ontario Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$114 Cheap Flights from Baltimore to Ontario in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Baltimore to Los Angeles

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

1:29 pm - 6:39 pmBWI Baltimore/Washington-ONT Ontario

8h 10m1 stop Dallas/Fort Worth

7:46 pm - 11:40 amONT Ontario-BWI Baltimore/Washington

12h 54m1 stop Dallas/Fort Worth

$232Frontier

Thu, Oct 1 - Mon, Oct 5

1:29 pm - 6:39 pmBWI Baltimore/Washington-ONT Ontario

8h 10m1 stop Dallas/Fort Worth

8:11 pm - 11:40 amONT Ontario-BWI Baltimore/Washington

12h 29m1 stop Dallas/Fort Worth

$232Frontier

Thu, Sep 10 - Mon, Sep 14

7:02 am - 1:16 pmBWI Baltimore/Washington-ONT Ontario

9h 14m1 stop Seattle/Tacoma Intl

3:57 pm - 8:25 pmONT Ontario-BWI Baltimore/Washington

25h 28m1 stop Houston George Bush Intcntl

$308Multiple Airlines

Tue, Oct 6 - Fri, Oct 9

5:22 pm - 2:47 pmBWI Baltimore/Washington-ONT Ontario

24h 25m1 stop Houston George Bush Intcntl

11:13 am - 5:20 amONT Ontario-BWI Baltimore/Washington

15h 07m1 stop Seattle/Tacoma Intl

$309Multiple Airlines

Thu, Oct 15 - Tue, Oct 20

10:05 am - 5:50 pmBWI Baltimore/Washington-ONT Ontario

10h 45m1 stop Sacramento Intl

7:05 am - 5:00 pmONT Ontario-BWI Baltimore/Washington

6h 55m1 stop Dallas Love Field

$363Southwest

Thu, Sep 10 - Sat, Sep 12

10:50 am - 6:25 pmBWI Baltimore/Washington-ONT Ontario

10h 35m1 stop Sacramento Intl

6:50 am - 6:35 pmONT Ontario-BWI Baltimore/Washington

8h 45m1 stop Denver Intl

$363Southwest

Tue, Nov 10 - Tue, Nov 17

7:14 pm - 11:52 pmBWI Baltimore/Washington-ONT Ontario

7h 38m1 stop Dallas/Fort Worth

11:59 pm - 11:05 amONT Ontario-BWI Baltimore/Washington

8h 06m1 stop Dallas/Fort Worth

$363American Airlines

Sat, Oct 17 - Sat, Oct 24

3:57 pm - 10:37 pmBWI Baltimore/Washington-ONT Ontario

9h 40m1 stop Dallas/Fort Worth

8:25 am - 9:29 pmONT Ontario-BWI Baltimore/Washington

10h 04m1 stop Dallas/Fort Worth

$363American Airlines

Wed, Sep 9 - Sat, Sep 12

12:34 pm - 6:47 pmBWI Baltimore/Washington-ONT Ontario

9h 13m1 stop Chicago O'Hare Intl

1:29 pm - 11:08 pmONT Ontario-BWI Baltimore/Washington

6h 39m1 stop Denver Intl

$363United Airlines

Tue, Nov 10 - Tue, Nov 17

8:25 am - 6:11 pmBWI Baltimore/Washington-ONT Ontario

12h 46m2 stops Chicago O'Hare Intl San Francisco

7:00 am - 6:22 pmONT Ontario-BWI Baltimore/Washington

8h 22m1 stop Chicago O'Hare Intl

$368United Airlines

Thu, Sep 10 - Sat, Sep 12

Cheap last minute flights

Enter your travel dates to find the best prices.

4:44 pm - 7:32 amBWI Baltimore/Washington-ONT Ontario

17h 48m1 stop Houston George Bush Intcntl

7:11 pm - 11:40 amONT Ontario-BWI Baltimore/Washington

13h 29m1 stop Dallas/Fort Worth

$366Frontier

Sun, Aug 16 - Wed, Sep 16

4:44 pm - 7:32 amBWI Baltimore/Washington-ONT Ontario

17h 48m1 stop Houston George Bush Intcntl

9:36 am - 8:34 pmONT Ontario-BWI Baltimore/Washington

7h 58m1 stop Houston George Bush Intcntl

$368Frontier

Wed, Aug 12 - Fri, Aug 14

4:44 pm - 7:32 amBWI Baltimore/Washington-ONT Ontario

17h 48m1 stop Houston George Bush Intcntl

3:09 pm - 3:40 pmONT Ontario-BWI Baltimore/Washington

21h 31m1 stop Portland

$546Multiple Airlines

Wed, Aug 12 - Sat, Aug 22

7:26 am - 1:31 pmBWI Baltimore/Washington-ONT Ontario

9h 05m1 stop Dallas/Fort Worth

10:29 am - 9:34 pmONT Ontario-BWI Baltimore/Washington

8h 05m1 stop Dallas/Fort Worth

$589American Airlines

Fri, Aug 14 - Sat, Aug 15

7:26 am - 1:31 pmBWI Baltimore/Washington-ONT Ontario

9h 05m1 stop Dallas/Fort Worth

6:00 am - 5:45 pmONT Ontario-BWI Baltimore/Washington

8h 45m2 stops Dallas/Fort Worth Charlotte Douglas

$594American Airlines

Fri, Aug 14 - Sat, Aug 15

3:00 pm - 7:25 pmBWI Baltimore/Washington-ONT Ontario

7h 25m1 stop Las Vegas Harry Reid Intl

2:30 pm - 11:45 pmONT Ontario-BWI Baltimore/Washington

6h 15m1 stop Phoenix Sky Harbor Intl

$607Southwest

Fri, Aug 14 - Sun, Aug 16

2:50 pm - 7:35 pmBWI Baltimore/Washington-ONT Ontario

7h 45m1 stop Chicago Midway

11:00 am - 10:40 pmONT Ontario-BWI Baltimore/Washington

8h 40m1 stop Houston Hobby

$607Southwest

Wed, Aug 12 - Fri, Aug 14

6:00 am - 10:42 amBWI Baltimore/Washington-ONT Ontario

7h 42m1 stop Atlanta Hartsfield-Jackson

7:05 am - 7:50 pmONT Ontario-BWI Baltimore/Washington

9h 45m1 stop Atlanta Hartsfield-Jackson

$607Delta

Fri, Aug 14 - Sat, Aug 15

6:00 am - 10:42 amBWI Baltimore/Washington-ONT Ontario

7h 42m1 stop Atlanta Hartsfield-Jackson

10:00 pm - 9:19 amONT Ontario-BWI Baltimore/Washington

8h 19m1 stop Atlanta Hartsfield-Jackson

$607Delta

Fri, Aug 14 - Sun, Aug 16

4:44 pm - 7:32 amBWI Baltimore/Washington-ONT Ontario

17h 48m1 stop Houston George Bush Intcntl

6:02 am - 6:04 pmONT Ontario-BWI Baltimore/Washington

9h 02m1 stop Seattle/Tacoma Intl

$639Multiple Airlines

Sat, Aug 15 - Wed, Aug 19

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Frontier flights from Baltimore to Ontario

Our best Frontier deals on Baltimore to Ontario flight tickets

Frontier

Sep 10

BWI1:29 pmBaltimore/Washington

8h 10m

1 stop

ONT6:39 pmOntario

Sep 16

ONT7:11 pmOntario

13h 29m

1 stop

BWI11:40 amBaltimore/Washington

$232

Frontier

Sep 11

BWI1:29 pmBaltimore/Washington

8h 10m

1 stop

ONT6:39 pmOntario

Sep 14

ONT8:11 pmOntario

12h 29m

1 stop

BWI11:40 amBaltimore/Washington

$237

Frontier

Oct 3

BWI5:42 pmBaltimore/Washington

27h 06m

1 stop

ONT5:48 pmOntario

Oct 12

ONT3:57 pmOntario

25h 28m

1 stop

BWI8:25 pmBaltimore/Washington

$242

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BaltimoreOntario

BWI Baltimore/Washington - ONT Ontario

BWIONT

Baltimore/Washington

Thu 10/1

1:29 pm-6:39 pm

1 stop8h 10m

Ontario

Mon 10/5

7:46 pm-11:40 am

1 stop12h 54m

$232

BaltimoreOntario

BWI Baltimore/Washington - ONT Ontario

BWIONT

Baltimore/Washington

Thu 9/10

1:29 pm-6:39 pm

1 stop8h 10m

Ontario

Mon 9/14

8:11 pm-11:40 am

1 stop12h 29m

$232

BaltimoreOntario

BWI Baltimore/Washington - ONT Ontario

BWIONT

Baltimore/Washington

Tue 10/6

7:02 am-1:16 pm

1 stop9h 14m

Ontario

Fri 10/9

3:57 pm-8:25 pm

1 stop25h 28m

$308

BaltimoreOntario

BWI Baltimore/Washington - ONT Ontario

BWIONT

Baltimore/Washington

Thu 10/15

5:22 pm-2:47 pm

1 stop24h 25m

Ontario

Tue 10/20

11:13 am-5:20 am

1 stop15h 07m

$309

BaltimoreOntario

BWI Baltimore/Washington - ONT Ontario

BWIONT

Baltimore/Washington

Thu 9/10

10:05 am-5:50 pm

1 stop10h 45m

Ontario

Sat 9/12

7:05 am-5:00 pm

1 stop6h 55m

$363

BaltimoreOntario

BWI Baltimore/Washington - ONT Ontario

BWIONT

Baltimore/Washington

Tue 11/10

10:50 am-6:25 pm

1 stop10h 35m

Ontario

Tue 11/17

6:50 am-6:35 pm

1 stop8h 45m

$363

Quickest round-trip

BaltimoreOntario

BWI Baltimore/Washington - ONT Ontario

BWIONT

Baltimore/Washington

Sat 10/17

7:14 pm-11:52 pm

1 stop7h 38m

Ontario

Sat 10/24

11:59 pm-11:05 am

1 stop8h 06m

$363

BaltimoreOntario

BWI Baltimore/Washington - ONT Ontario

BWIONT

Baltimore/Washington

Wed 9/9

3:57 pm-10:37 pm

1 stop9h 40m

Ontario

Sat 9/12

8:25 am-9:29 pm

1 stop10h 04m

$363

BaltimoreOntario

BWI Baltimore/Washington - ONT Ontario

BWIONT

Baltimore/Washington

Tue 11/10

12:34 pm-6:47 pm

1 stop9h 13m

Ontario

Tue 11/17

1:29 pm-11:08 pm

1 stop6h 39m

$363

BaltimoreOntario

BWI Baltimore/Washington - ONT Ontario

BWIONT

Baltimore/Washington

Thu 9/10

8:25 am-6:11 pm

2 stops12h 46m

Ontario

Sat 9/12

7:00 am-6:22 pm

1 stop8h 22m

$368

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Baltimore to Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Layovers

What is the typical price of a round-trip flight between Baltimore and Ontario?

Prices are currently low for flights on this route.

Typical prices usually range from $474 to $549.
The lowest price recently found on this route was $232.

What is the cheapest month to fly to Ontario?

In general, November is the cheapest month to fly from Baltimore to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $352. If you aren’t able to travel during the month of November, then book flights to Ontario from Baltimore during February instead. Flights to Ontario in February, while not as cheap as those in November, still average around $371.

What is the cheapest Baltimore/Washington to Ontario flight route?

Fly from Baltimore/Washington to Ontario for the best Baltimore/Washington - Ontario flight prices

What cabin class options are available on Baltimore to Ontario flights?

There is only 1 cabin class available to choose from on Baltimore to Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Baltimore to Ontario flights?

You could potentially save up to 1% on your flight if you consider stops on a Baltimore to Ontario flight.

How have Baltimore to Ontario flight prices changed over time?

As of August 2026, prices for Baltimore to Ontario flights are approximately 92% more expensive when compared to flights at the same time last year.

When to book flights from Baltimore to Ontario

Are you open to changing your travel dates? Check out the ideal times to fly from Baltimore to Ontario according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Baltimore to Ontario (BWI to ONT) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Baltimore to Ontario

Fastest flight time	7h 10m
Direct flights	None

The fastest flight from Baltimore to Ontario takes 7h 10m

There are no direct flights from Baltimore to Ontario. There are no popular flight routes from Baltimore to Ontario.

Search flight deals

Frequently asked questions about flying from Baltimore to Ontario

How far is Baltimore/Washington to Ontario by plane?
Ontario is 2281.3 mi away from Baltimore/Washington. By plane, this route typically takes 7h 10m.
When did momondo last update prices for flights from Baltimore/Washington Airport to Ontario Airport?
Prices for flights from Baltimore/Washington Airport to Ontario Airport refresh daily.
How many operators does momondo search for flights from Baltimore/Washington Airport to Ontario Airport?
As of August 2026, there are 5 operators available to choose from for flights from Baltimore/Washington Airport to Ontario Airport.
How old do you have to be to fly from Baltimore/Washington Airport to Ontario Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Baltimore/Washington Airport to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The necessary travel and health documents for your Ontario Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Baltimore to Ontario?
Based on momondo bookings for flights between Baltimore and Ontario, the leading plane model is Boeing 737-800 Passenger/BBJ2 (winglets), making up 28.07% of the total bookings. Other popular models include Boeing 737 MAX 9 with 14.04%, Boeing 737 MAX 8 with 12.28%, and Airbus A321neo with 7.02%.
What is the most popular airline from Baltimore to Ontario?
momondo data reveals that the most frequently booked airline on the route from Baltimore to Ontario is Southwest, representing 62% of all bookings. The subsequent popular airlines are Delta at 13%, American Airlines at 10%, and United Airlines at 9%.

Best airlines flying from Baltimore to Ontario

Compare and see reviews for airlines that fly from Baltimore to Ontario with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $192	Free Cancellation	Rating 7.8 8,505 reviews	Search Delta flights
Frontier	PriceFrom $211	Free Cancellation	Rating 5.6 2,704 reviews	Search Frontier flights
United Airlines	PriceFrom $344	Free Cancellation	Rating 7.4 10,102 reviews	Search United Airlines flights
Southwest	PriceFrom $346	Free Cancellation	Rating 8.0 4,221 reviews	Search Southwest flights
American Airlines	PriceFrom $460	Free Cancellation	Rating 7.1 11,902 reviews	Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Baltimore to Ontario?

It is quick and easy to find Baltimore to Ontario flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Ontario that suits you.

Can I find flights from Baltimore to Ontario with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Baltimore to Ontario flights to just show those with flexible booking policies.

How can momondo help me find flights from Baltimore to Ontario?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Baltimore to Ontario.

I’m not ready to book a flight from Baltimore to Ontario right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Baltimore to Ontario now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Ontario and let you know when they change.

An easier way to manage your Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

Thu 9/10

Thu 9/17

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States

Nearby airports

Airlines

Cabin classes

Other United States destinations

Complete your trip

Feeling lucky

Cheap flights from Baltimore to Los Angeles from $114

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Baltimore to Los Angeles departing on 8/29. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from Baltimore to Los Angeles

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Frontier flights from Baltimore to Ontario

Our best Frontier deals on Baltimore to Ontario flight tickets

momondo Fare Finder

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

See travel insights to Los Angeles from

How to get the cheapest flight ticket from Baltimore to Ontario

What is the typical price of a round-trip flight between Baltimore and Ontario?

What is the cheapest month to fly to Ontario?

What is the cheapest Baltimore/Washington to Ontario flight route?

What cabin class options are available on Baltimore to Ontario flights?

Can stopping save me money on Baltimore to Ontario flights?

How have Baltimore to Ontario flight prices changed over time?

What is the cheapest airline that flies from Baltimore/Washington to Ontario?

What airlines fly to Ontario?

Which airport is the most popular layover for flights between Baltimore and Ontario?

Which layover airport offers the lowest fares from Baltimore to Ontario?

Which layover airport has the shortest travel time from Baltimore to Ontario?

Which layover airport has the shortest connection time from Baltimore to Ontario?

When to book flights from Baltimore to Ontario

Cheap Baltimore to Ontario (BWI to ONT) flight deals and tips

Fastest flight time

Direct flights

Frequently asked questions about flying from Baltimore to Ontario

Best airlines flying from Baltimore to Ontario

Compare and see reviews for airlines that fly from Baltimore to Ontario with momondo

Why use momondo?

An easier way to manage your Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing California

Fly your favorite airline to Los Angeles

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Los Angeles

List of cabin classes available on flights landing in Los Angeles. Availability may vary depending on flight origin and airline.

Popular cities in the United States

Popular flights according to clicks in the last 7 days on momondo

Complete your trip to Los Angeles

Explore popular destinations other users love

According to popular flight searches on momondo this year