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Cheap flights from Ontario to Maryland from $96

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 Maryland departing on 11/18. 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 Maryland

Cheap round-trip flights

Frontier Logo
6:53 am - 5:19 amONT-PHL
19h 26m1 stop
Frontier Logo
6:42 am - 9:35 amPHL-ONT
29h 53m1 stop
$164Frontier
Find Deal
Wed, Oct 22 - Sat, Oct 25
Frontier Logo
6:53 am - 5:44 pmONT-BWI
7h 51m1 stop
Frontier Logo
9:59 pm - 7:29 amBWI-ONT
12h 30m1 stop
$165Frontier
Find Deal
Sun, Oct 26 - Sun, Nov 2
Frontier Logo
8:34 am - 1:41 amONT-PHL
14h 07m1 stop
Frontier Logo
6:19 am - 11:10 amPHL-ONT
7h 51m1 stop
$165Frontier
Find Deal
Fri, Oct 24 - Thu, Nov 6
United Airlines Logo
6:36 pm - 9:55 amONT-BWI
12h 19m2 stops
United Airlines Logo
4:12 pm - 8:44 pmBWI-ONT
7h 32m1 stop
$234United Airlines
Find Deal
Wed, Oct 22 - Wed, Oct 29
Delta Logo
7:05 am - 5:17 pmONT-BWI
7h 12m1 stop
Delta Logo
6:00 am - 10:26 amBWI-ONT
7h 26m1 stop
$274Delta
Find Deal
Wed, Oct 15 - Sat, Oct 18
Delta Logo
11:36 am - 10:09 pmONT-BWI
7h 33m1 stop
Delta Logo
6:00 am - 11:06 amBWI-ONT
8h 06m1 stop
$276Delta
Find Deal
Sat, Nov 8 - Sat, Nov 15
United Airlines Logo
1:15 pm - 11:22 pmONT-IAD
7h 07m1 stop
United Airlines Logo
4:10 pm - 10:51 pmIAD-ONT
9h 41m1 stop
$314United Airlines
Find Deal
Wed, Oct 22 - Wed, Oct 29
American Airlines Logo
10:34 pm - 8:41 amONT-IAD
7h 07m1 stop
American Airlines Logo
6:35 am - 11:36 amIAD-ONT
8h 01m1 stop
$320American Airlines
Find Deal
Sat, Nov 8 - Sat, Nov 15
American Airlines Logo
9:59 am - 11:07 pmONT-IAD
10h 08m2 stops
American Airlines Logo
6:04 am - 4:01 pmIAD-ONT
12h 57m2 stops
$329American Airlines
Find Deal
Wed, Nov 12 - Wed, Nov 19
Southwest Logo
8:50 am - 11:05 pmONT-IAD
11h 15m2 stops
Southwest Logo
7:45 pm - 11:40 pmIAD-ONT
6h 55m1 stop
$373Southwest
Find Deal
Wed, Oct 22 - Mon, Oct 27

Frontier flights from Ontario to Maryland

Our best Frontier deals on Ontario to Maryland flight tickets
Frontier
Oct 22
ONT6:53 amOntario
19h 26m
1 stop
PHL5:19 amPhiladelphia
Oct 25
PHL6:42 amPhiladelphia
29h 53m
1 stop
ONT9:35 amOntario
$164
Find similar
Frontier
Oct 24
ONT8:34 amOntario
14h 07m
1 stop
PHL1:41 amPhiladelphia
Nov 6
PHL6:19 amPhiladelphia
7h 51m
1 stop
ONT11:10 amOntario
$165
Find similar
Frontier
Oct 23
ONT10:30 amOntario
28h 14m
1 stop
BWI5:44 pmBaltimore/Washington
Oct 24
BWI9:42 pmBaltimore/Washington
13h 07m
1 stop
ONT7:49 amOntario
$167
Find similar

American Airlines flights from Ontario to Maryland

Our best American Airlines deals on Ontario to Maryland flight tickets
American Airlines
Nov 8
ONT10:34 pmOntario
7h 07m
1 stop
IAD8:41 amWashington, D.C. Dulles Intl
Nov 15
IAD6:35 amWashington, D.C. Dulles Intl
8h 01m
1 stop
ONT11:36 amOntario
$320
Find similar
American Airlines
Nov 12
ONT9:59 amOntario
10h 08m
2 stops
IAD11:07 pmWashington, D.C. Dulles Intl
Nov 19
IAD6:04 amWashington, D.C. Dulles Intl
12h 57m
2 stops
ONT4:01 pmOntario
$329
Find similar
American Airlines
Oct 20
ONT11:59 pmOntario
10h 49m
2 stops
IAD1:48 pmWashington, D.C. Dulles Intl
Oct 22
IAD8:09 amWashington, D.C. Dulles Intl
10h 15m
2 stops
ONT3:24 pmOntario
$339
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Maryland 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 September 23, 2025.
Use the filters below to find and compare flights from Ontario to Maryland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Wed 10/22

6:53 am-5:19 am

1 stop19h 26m

Philadelphia

Sat 10/25

6:42 am-9:35 am

1 stop29h 53m

$164

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Sun 10/26

6:53 am-5:44 pm

1 stop7h 51m

Baltimore/Washington

Sun 11/2

9:59 pm-7:29 am

1 stop12h 30m

$165

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Fri 10/24

8:34 am-1:41 am

1 stop14h 07m

Philadelphia

Thu 11/6

6:19 am-11:10 am

1 stop7h 51m

$165

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Wed 10/22

6:36 pm-9:55 am

2 stops12h 19m

Baltimore/Washington

Wed 10/29

4:12 pm-8:44 pm

1 stop7h 32m

$234

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Wed 10/15

7:05 am-5:17 pm

1 stop7h 12m

Baltimore/Washington

Sat 10/18

6:00 am-10:26 am

1 stop7h 26m

$274

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Sat 11/8

11:36 am-10:09 pm

1 stop7h 33m

Baltimore/Washington

Sat 11/15

6:00 am-11:06 am

1 stop8h 06m

$276

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 10/22

1:15 pm-11:22 pm

1 stop7h 07m

Washington, D.C. Dulles Intl

Wed 10/29

4:10 pm-10:51 pm

1 stop9h 41m

$314

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Sat 11/8

10:34 pm-8:41 am

1 stop7h 07m

Washington, D.C. Dulles Intl

Sat 11/15

6:35 am-11:36 am

1 stop8h 01m

$320

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 11/12

9:59 am-11:07 pm

2 stops10h 08m

Washington, D.C. Dulles Intl

Wed 11/19

6:04 am-4:01 pm

2 stops12h 57m

$329

OntarioWashington, D.C.

ONT - IAD

ONTIAD

Ontario

Wed 10/22

8:50 am-11:05 pm

2 stops11h 15m

Washington, D.C. Dulles Intl

Mon 10/27

7:45 pm-11:40 pm

1 stop6h 55m

$373

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 Maryland from

How to get the cheapest flight ticket from Ontario to Maryland

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 Maryland?

The cheapest month to fly to Maryland from Ontario is in May. Flight prices, which tend to average around $228, are often lower during this time because this is during the off-season. If you don’t want to visit Maryland in May, then you should wait until August to fly from Ontario, when ticket prices are also cheap, with an average price of $278.

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

The cheapest day to depart from Ontario to Maryland is on a Wednesday. Travelers who choose to depart for Maryland on a Wednesday will often find tickets for as low as $314. The most expensive day to fly to Maryland is Sunday, with ticket prices averaging around $492.

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

Our most recent data shows that the best time of day to fly to Maryland is in the afternoon. Flights from Ontario to Maryland during this time can be as low as $288. In contrast, the most expensive time of day to depart to Maryland is at noon when prices are around $423.

What is the cheapest Ontario to Maryland flight route?

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

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

You are more likely to see cheaper flights to Maryland from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Maryland for around $447 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Maryland from Ontario for as low as $297 on momondo.

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

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

Cheap Ontario to Maryland flight deals and tips

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

Best Price Found

$190

Fastest flight time

4h 40m

Direct flights

Every day

Airports in Maryland

1 airport
The best one-way flight to Maryland from Ontario in the past 72 hours is $190. The best round-trip flight deal from Ontario to Maryland found on momondo in the last 72 hours is $407.
The fastest flight from Ontario to Maryland takes 4h 40m
Direct flights go from Ontario to Maryland every day.
There is 1 airport near Maryland: Baltimore/Washington (BWI)
Search flight deals

  • When did momondo last update prices for flights from Ontario Airport to Maryland?

    Prices for flights from Ontario Airport to Maryland were last updated today.

  • How many operators does momondo search for flights from Ontario Airport to Maryland?

  • How old do you have to be to fly from Ontario Airport to Maryland?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Maryland.

  • What documentation or ID do you need to fly to Maryland?

    The travel and health documents required for your trip to Maryland can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Maryland. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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

Best airlines flying from Ontario to Maryland

Compare and see reviews for airlines that fly from Ontario to Maryland with momondo
Airline
Rating
Free Cancellation
Price
Spirit AirlinesPriceFrom $98Free CancellationRating
6.3
8,041 reviews
Search Spirit Airlines flights
FrontierPriceFrom $148Free CancellationRating
5.8
3,165 reviews
Search Frontier flights
United AirlinesPriceFrom $296Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
DeltaPriceFrom $326Free CancellationRating
7.9
7,974 reviews
Search Delta flights
SouthwestPriceFrom $337Free CancellationRating
8.0
4,244 reviews
Search Southwest flights
American AirlinesPriceFrom $346Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Ontario to Maryland. Millions of users trust and use momondo every year so you are in good hands.

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

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

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

momondo helps you find the best flight between Ontario and Maryland by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are simply researching potential flights to Maryland, momondo offers a useful price alert feature which will track prices for flights to Maryland from Ontario and alert you when they change.

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