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Cheap flights from Ontario to Washington, D.C. from $100

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

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
6:25 am - 11:08 amONT  Ontario-BWI Baltimore/Washington
25h 43m2 stops Denver Intl Dallas/Fort Worth
Frontier Logo
6:28 pm - 10:42 amBWI  Baltimore/Washington-ONT Ontario
19h 14m2 stops Detroit Metropolitan Wayne County Denver Intl
$189Frontier
Tue, Nov 3 - Fri, Nov 13
Frontier Logo
5:25 pm - 9:27 amONT  Ontario-BWI Baltimore/Washington
13h 02m2 stops Las Vegas Harry Reid Intl Atlanta Hartsfield-Jackson
Frontier Logo
12:37 pm - 11:50 pmBWI  Baltimore/Washington-ONT Ontario
14h 13m2 stops Dallas/Fort Worth Denver Intl
$197Frontier
Tue, Oct 20 - Wed, Oct 21
Multiple Airlines Logo
11:52 am - 11:22 amONT  Ontario-BWI Baltimore/Washington
20h 30m2 stops Denver Intl Minneapolis St Paul
Multiple Airlines Logo
5:40 am - 11:51 pmBWI  Baltimore/Washington-ONT Ontario
21h 11m3 stops Atlanta Hartsfield-Jackson Dallas/Fort Worth Denver Intl
$304Multiple Airlines
Sat, Nov 14 - Tue, Nov 17
Multiple Airlines Logo
11:13 am - 5:20 amONT  Ontario-BWI Baltimore/Washington
15h 07m1 stop Seattle/Tacoma Intl
Multiple Airlines Logo
2:07 pm - 7:08 pmBWI  Baltimore/Washington-ONT Ontario
8h 01m1 stop Dallas/Fort Worth
$324Multiple Airlines
Tue, Oct 27 - Mon, Nov 2
Southwest Logo
1:30 pm - 10:55 pmONT  Ontario-BWI Baltimore/Washington
6h 25m1 stop Las Vegas Harry Reid Intl
Southwest Logo
7:55 am - 12:45 pmBWI  Baltimore/Washington-ONT Ontario
7h 50m1 stop Chicago Midway
$385Southwest
Tue, Dec 1 - Sat, Dec 5
Southwest Logo
8:55 am - 7:20 pmONT  Ontario-BWI Baltimore/Washington
7h 25m1 stop Sacramento Intl
Southwest Logo
6:15 am - 10:45 amBWI  Baltimore/Washington-ONT Ontario
7h 30m1 stop Dallas Love Field
$385Southwest
Mon, Nov 16 - Tue, Nov 17
American Airlines Logo
6:00 am - 4:08 pmONT  Ontario-BWI Baltimore/Washington
7h 08m1 stop Dallas/Fort Worth
American Airlines Logo
12:39 pm - 6:51 pmBWI  Baltimore/Washington-ONT Ontario
9h 12m1 stop Dallas/Fort Worth
$385American Airlines
Thu, Jan 28 - Tue, Feb 2
American Airlines Logo
10:30 am - 10:53 pmONT  Ontario-BWI Baltimore/Washington
9h 23m1 stop Dallas/Fort Worth
American Airlines Logo
6:33 am - 1:19 pmBWI  Baltimore/Washington-ONT Ontario
9h 46m1 stop Dallas/Fort Worth
$385American Airlines
Wed, Nov 18 - Mon, Nov 23
Delta Logo
11:08 pm - 9:22 amONT  Ontario-BWI Baltimore/Washington
7h 14m1 stop Atlanta Hartsfield-Jackson
Delta Logo
7:10 am - 12:30 pmBWI  Baltimore/Washington-ONT Ontario
8h 20m1 stop Salt Lake City
$385Delta
Thu, Dec 3 - Wed, Jan 6
Delta Logo
5:03 pm - 5:45 amONT  Ontario-BWI Baltimore/Washington
9h 42m1 stop Salt Lake City
Delta Logo
7:00 am - 12:36 pmBWI  Baltimore/Washington-ONT Ontario
8h 36m1 stop Salt Lake City
$385Delta
Tue, Oct 20 - Sat, Oct 24

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Frontier flights from Ontario to Baltimore

Our best Frontier deals on Ontario to Baltimore flight tickets
Frontier
Nov 3
ONT6:25 amOntario
25h 43m
2 stops
BWI11:08 amBaltimore/Washington
Nov 13
BWI6:28 pmBaltimore/Washington
19h 14m
2 stops
ONT10:42 amOntario
$189
Frontier
Oct 20
ONT5:25 pmOntario
13h 02m
2 stops
BWI9:27 amBaltimore/Washington
Oct 21
BWI12:37 pmBaltimore/Washington
14h 13m
2 stops
ONT11:50 pmOntario
$197
Frontier
Oct 20
ONT11:52 amOntario
20h 41m
2 stops
BWI11:33 amBaltimore/Washington
Oct 24
BWI12:37 pmBaltimore/Washington
14h 13m
2 stops
ONT11:50 pmOntario
$200

momondo Fare Finder

 
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

Cheapest round-trip

OntarioBaltimore

ONT Ontario - BWI Baltimore/Washington

ONTBWI

Ontario

Tue 11/3

6:25 am-11:08 am

2 stops25h 43m

Baltimore/Washington

Fri 11/13

6:28 pm-10:42 am

2 stops19h 14m

$189

OntarioBaltimore

ONT Ontario - BWI Baltimore/Washington

ONTBWI

Ontario

Tue 10/20

5:25 pm-9:27 am

2 stops13h 02m

Baltimore/Washington

Wed 10/21

12:37 pm-11:50 pm

2 stops14h 13m

$197

OntarioBaltimore

ONT Ontario - BWI Baltimore/Washington

ONTBWI

Ontario

Sat 11/14

11:52 am-11:22 am

2 stops20h 30m

Baltimore/Washington

Tue 11/17

5:40 am-11:51 pm

3 stops21h 11m

$304

OntarioBaltimore

ONT Ontario - BWI Baltimore/Washington

ONTBWI

Ontario

Tue 10/27

11:13 am-5:20 am

1 stop15h 07m

Baltimore/Washington

Mon 11/2

2:07 pm-7:08 pm

1 stop8h 01m

$324
Quickest round-trip

OntarioBaltimore

ONT Ontario - BWI Baltimore/Washington

ONTBWI

Ontario

Tue 12/1

1:30 pm-10:55 pm

1 stop6h 25m

Baltimore/Washington

Sat 12/5

7:55 am-12:45 pm

1 stop7h 50m

$385

OntarioBaltimore

ONT Ontario - BWI Baltimore/Washington

ONTBWI

Ontario

Mon 11/16

8:55 am-7:20 pm

1 stop7h 25m

Baltimore/Washington

Tue 11/17

6:15 am-10:45 am

1 stop7h 30m

$385

OntarioBaltimore

ONT Ontario - BWI Baltimore/Washington

ONTBWI

Ontario

Thu 1/28

6:00 am-4:08 pm

1 stop7h 08m

Baltimore/Washington

Tue 2/2

12:39 pm-6:51 pm

1 stop9h 12m

$385

OntarioBaltimore

ONT Ontario - BWI Baltimore/Washington

ONTBWI

Ontario

Wed 11/18

10:30 am-10:53 pm

1 stop9h 23m

Baltimore/Washington

Mon 11/23

6:33 am-1:19 pm

1 stop9h 46m

$385

OntarioBaltimore

ONT Ontario - BWI Baltimore/Washington

ONTBWI

Ontario

Thu 12/3

11:08 pm-9:22 am

1 stop7h 14m

Baltimore/Washington

Wed 1/6

7:10 am-12:30 pm

1 stop8h 20m

$385

OntarioBaltimore

ONT Ontario - BWI Baltimore/Washington

ONTBWI

Ontario

Tue 10/20

5:03 pm-5:45 am

1 stop9h 42m

Baltimore/Washington

Sat 10/24

7:00 am-12:36 pm

1 stop8h 36m

$385

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

Prices are currently low for flights on this route.

Typical prices usually range from $473 to $612.
The lowest price recently found on this route was $189.

What is the cheapest month to fly to Baltimore?

If you’re not able to fly to Baltimore in February, then January is your next best option. Flight prices from Ontario to Baltimore during January average around $380.

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

The cheapest day to depart from Ontario to Baltimore is on a Wednesday. Travelers who choose to depart for Baltimore on a Wednesday will often find tickets for as low as $445. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $543. 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 morning is the least expensive time of day to depart. momondo users have found prices as low as $481 when looking at flights departing in the morning. Flights at noon are often more expensive with an average ticket price of $509.

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 from Ontario 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 $473 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 $269 on momondo.

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

There is only 1 cabin class available to choose from on Ontario to Baltimore 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 October 2026, prices for Ontario to Baltimore flights are approximately 83% 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

$100

Fastest flight time

7h 03m

Direct flights

None
The best one-way flight to Baltimore from Ontario in the past 72 hours is $100. The best round-trip flight deal from Ontario to Baltimore found on momondo in the last 72 hours is $189.
The fastest flight from Ontario to Baltimore takes 7h 03m
There are no direct flights from Ontario to Baltimore. There are no popular flight routes from Ontario to Baltimore.
Search flight deals

Frequently asked questions about flying from Ontario to Baltimore

  • 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 7h 03m.

  • 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
DeltaPriceFrom $183Free CancellationRating
7.8
8,630 reviews
Search Delta flights
FrontierPriceFrom $221Free CancellationRating
5.6
2,565 reviews
Search Frontier flights
United AirlinesPriceFrom $272Free CancellationRating
7.4
10,280 reviews
Search United Airlines flights
SouthwestPriceFrom $352Free CancellationRating
7.9
4,214 reviews
Search Southwest flights
JetBluePriceFrom $361Free CancellationRating
7.1
3,044 reviews
Search JetBlue flights
American AirlinesPriceFrom $434Free CancellationRating
7.0
12,126 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.

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