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Cheap flights from Ontario to Washington, D.C. from $84

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Washington, D.C. departing on 2/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ontario to Washington, D.C.

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
7:56 pm - 11:39 am
ONT
-
BWI
12h 43m1 stop
Frontier Logo
7:58 pm - 12:43 pm
BWI
-
ONT
19h 45m1 stop
$195Frontier
Thu, Jan 15 - Thu, Jan 22
Multiple Airlines Logo
1:46 pm - 10:27 am
ONT
-
BWI
17h 41m1 stop
Multiple Airlines Logo
6:00 am - 9:34 pm
BWI
-
ONT
18h 34m2 stops
$203Multiple Airlines
Mon, Feb 2 - Tue, Feb 10
Multiple Airlines Logo
1:46 pm - 10:27 am
ONT
-
BWI
17h 41m1 stop
Multiple Airlines Logo
11:38 am - 1:52 pm
BWI
-
ONT
29h 14m2 stops
$216Multiple Airlines
Mon, Feb 2 - Mon, Feb 9
Frontier Logo
7:56 pm - 11:39 am
ONT
-
BWI
12h 43m1 stop
Frontier Logo
12:42 pm - 7:01 pm
BWI
-
ONT
9h 19m1 stop
$217Frontier
Thu, Jan 15 - Sun, Jan 18
Multiple Airlines Logo
1:46 pm - 10:27 am
ONT
-
BWI
17h 41m1 stop
Multiple Airlines Logo
6:00 am - 6:22 pm
BWI
-
ONT
15h 22m2 stops
$221Multiple Airlines
Mon, Feb 2 - Wed, Feb 11
Frontier Logo
2:06 pm - 10:43 am
ONT
-
BWI
17h 37m1 stop
Frontier Logo
6:00 am - 9:34 pm
BWI
-
ONT
18h 34m2 stops
$230Frontier
Thu, Feb 5 - Tue, Feb 10
Multiple Airlines Logo
1:46 pm - 10:27 am
ONT
-
BWI
17h 41m1 stop
Multiple Airlines Logo
9:20 am - 12:10 pm
BWI
-
ONT
29h 50m2 stops
$238Multiple Airlines
Mon, Feb 2 - Sun, Feb 8
Frontier Logo
2:06 pm - 10:43 am
ONT
-
BWI
17h 37m1 stop
Frontier Logo
11:38 am - 1:52 pm
BWI
-
ONT
29h 14m2 stops
$242Frontier
Thu, Feb 5 - Mon, Feb 9
Frontier Logo
8:32 am - 12:03 pm
ONT
-
BWI
24h 31m1 stop
Frontier Logo
7:10 am - 3:07 pm
BWI
-
ONT
10h 57m2 stops
$245Frontier
Fri, Jan 16 - Tue, Jan 20
Frontier Logo
2:06 pm - 10:43 am
ONT
-
BWI
17h 37m1 stop
Frontier Logo
6:00 am - 6:22 pm
BWI
-
ONT
15h 22m2 stops
$248Frontier
Thu, Feb 5 - Wed, Feb 11

Frontier flights from Ontario to Baltimore

Our best Frontier deals on Ontario to Baltimore flight tickets
Frontier
Jan 15
ONT7:56 pmOntario
12h 43m
1 stop
BWI11:39 amBaltimore/Washington
Jan 22
BWI7:58 pmBaltimore/Washington
19h 45m
1 stop
ONT12:43 pmOntario
$194
Find similar
Frontier
Jan 15
ONT7:56 pmOntario
12h 43m
1 stop
BWI11:39 amBaltimore/Washington
Jan 22
BWI7:58 pmBaltimore/Washington
19h 45m
1 stop
ONT12:43 pmOntario
$195
Find similar
Frontier
Jan 15
ONT7:56 pmOntario
12h 43m
1 stop
BWI11:39 amBaltimore/Washington
Jan 18
BWI12:42 pmBaltimore/Washington
9h 19m
1 stop
ONT7:01 pmOntario
$217
Find similar

Delta flights from Ontario to Baltimore

Our best Delta deals on Ontario to Baltimore flight tickets
Delta
Feb 5
ONT7:30 amOntario
12h 56m
2 stops
BWI11:26 pmBaltimore/Washington
Feb 11
BWI1:02 pmBaltimore/Washington
12h 42m
2 stops
ONT10:44 pmOntario
$296
Find similar
Delta
Jan 8
ONT7:30 amOntario
12h 56m
2 stops
BWI11:26 pmBaltimore/Washington
Jan 17
BWI1:02 pmBaltimore/Washington
12h 49m
2 stops
ONT10:51 pmOntario
$316
Find similar
Delta
Jan 13
ONT7:30 amOntario
13h 14m
2 stops
BWI11:44 pmBaltimore/Washington
Jan 20
BWI6:00 amBaltimore/Washington
10h 56m
2 stops
ONT1:56 pmOntario
$317
Find similar

momondo Fare Finder

 
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, momondo users made 832,500 searches. Data last updated December 18, 2025.
Use the filters below to find and compare flights from Ontario to Baltimore that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Thu 1/15

7:56 pm-11:39 am

1 stop12h 43m

Baltimore/Washington

Thu 1/22

7:58 pm-12:43 pm

1 stop19h 45m

$195

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Mon 2/2

1:46 pm-10:27 am

1 stop17h 41m

Baltimore/Washington

Tue 2/10

6:00 am-9:34 pm

2 stops18h 34m

$203

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Mon 2/2

1:46 pm-10:27 am

1 stop17h 41m

Baltimore/Washington

Mon 2/9

11:38 am-1:52 pm

2 stops29h 14m

$216

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Thu 1/15

7:56 pm-11:39 am

1 stop12h 43m

Baltimore/Washington

Sun 1/18

12:42 pm-7:01 pm

1 stop9h 19m

$217

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Mon 2/2

1:46 pm-10:27 am

1 stop17h 41m

Baltimore/Washington

Wed 2/11

6:00 am-6:22 pm

2 stops15h 22m

$221

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Thu 2/5

2:06 pm-10:43 am

1 stop17h 37m

Baltimore/Washington

Tue 2/10

6:00 am-9:34 pm

2 stops18h 34m

$230

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Mon 2/2

1:46 pm-10:27 am

1 stop17h 41m

Baltimore/Washington

Sun 2/8

9:20 am-12:10 pm

2 stops29h 50m

$238

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Thu 2/5

2:06 pm-10:43 am

1 stop17h 37m

Baltimore/Washington

Mon 2/9

11:38 am-1:52 pm

2 stops29h 14m

$242

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Fri 1/16

8:32 am-12:03 pm

1 stop24h 31m

Baltimore/Washington

Tue 1/20

7:10 am-3:07 pm

2 stops10h 57m

$245

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Thu 2/5

2:06 pm-10:43 am

1 stop17h 37m

Baltimore/Washington

Wed 2/11

6:00 am-6:22 pm

2 stops15h 22m

$248

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from Ontario to Baltimore

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

What is the cheapest month to fly to Baltimore?

If you’re not able to fly to Baltimore in May, then April is your next best option. Flight prices from Ontario to Baltimore during April average around $402.

What is the cheapest day to depart on your flight to Baltimore?

The cheapest day to depart from Ontario to Baltimore is on a Friday. Travelers who choose to depart for Baltimore on a Friday will often find tickets for as low as $294. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $402. These prices are subject to change though, so be sure to set up a Price Alert for flights to Baltimore.

What is the cheapest time of day to depart on your flight to Baltimore?

Flying to Baltimore from Ontario in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $323 when looking at flights departing in the afternoon. Flights at noon are often more expensive with an average ticket price of $366.

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

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

How far in advance should I book a flight to Baltimore?

You are more likely to see cheaper flights to Baltimore from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Baltimore for around $451 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Baltimore from Ontario for as low as $324 on momondo.

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

There is only 1 cabin class available to choose from on Ontario to Baltimore/Washington 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 Ontario to Baltimore flights?

No. A direct flight is the cheapest option for a flight between Ontario to Baltimore.

How have Ontario to Baltimore flight prices changed over time?

As of December 2025, prices for Ontario to Baltimore flights are approximately 118% more expensive when compared to flights at the same time last year.

When to book flights from Ontario to Baltimore

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

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

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

Best Price Found

$218

Fastest flight time

4h 40m

Direct flights

Every day

Airports in Baltimore

1 airport
The best one-way flight to Baltimore from Ontario in the past 72 hours is $218. The best round-trip flight deal from Ontario to Baltimore found on momondo in the last 72 hours is $533.
The fastest flight from Ontario to Baltimore takes 4h 40m
Direct flights go from Ontario to Baltimore every day.
There is 1 airport in Baltimore. From Ontario there are direct flights to Baltimore/Washington (BWI).
Search flight deals

  • How far is Ontario to Baltimore/Washington by plane?

    The straight-line distance from Ontario to Baltimore/Washington is 2281.3 mi. In terms of flight time, this usually takes a little over 4h 40m.

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

    Prices for flights from Ontario Airport to Baltimore/Washington Airport are refreshed on a daily basis.

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

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

  • What documentation or ID do you need to fly to Baltimore/Washington Airport?

    The required travel and health documents for your Baltimore/Washington Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Baltimore/Washington Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Ontario to Baltimore?

  • What is the most popular airline from Ontario to Baltimore?

Best airlines flying from Ontario to Baltimore

Compare and see reviews for airlines that fly from Ontario to Baltimore with momondo
Airline
Rating
Free Cancellation
Price
Spirit AirlinesPriceFrom $98Free CancellationRating
6.3
8,190 reviews
Search Spirit Airlines flights
FrontierPriceFrom $175Free CancellationRating
5.8
3,081 reviews
Search Frontier flights
United AirlinesPriceFrom $276Free CancellationRating
7.4
9,093 reviews
Search United Airlines flights
DeltaPriceFrom $276Free CancellationRating
7.9
8,008 reviews
Search Delta flights
SouthwestPriceFrom $337Free CancellationRating
7.9
4,250 reviews
Search Southwest flights
American AirlinesPriceFrom $346Free CancellationRating
7.2
11,055 reviews
Search American Airlines flights

Why use momondo?

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

Finding the right flight to Baltimore from Ontario is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Baltimore quick and easy, saving you time and money.

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

momondo does allow users to show only those flights to Baltimore from Ontario which offer a flexible booking policy as well as other useful filters and features.

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

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 Ontario to Baltimore.

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

Yes. momondo can track prices for Ontario to Baltimore flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Baltimore trip

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