What airlines fly to Ontario?

Spirit Airlines, Southwest and United Airlines are the top three most popular airlines that fly to Ontario from Maryland according to our data. Spirit Airlines is the first choice among our users, with 44% 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.

What is the cheapest airline that flies from Maryland to Ontario?

Frontier, American Airlines, and Alaska Airlines are the most popular carriers operating from Maryland to Ontario

How many flights depart from Maryland to Ontario on average per week?

The number of flights available between Maryland and Ontario is 7 per week as of September 2025. The most frequent departure day is Mon, with 14% of weekly flights leaving on this day.

How long does it take to fly to Ontario?

Average flight duration from Maryland to Ontario depends on which airport you fly into and out of. Flying from Baltimore to Los Angeles is 5h 27m on average, while flying from Salisbury to Los Angeles is 7h 32m on average. Los Angeles is the most popular airport in Ontario.

How many flights depart from Maryland to Ontario on average per day?

As of September 2025, 1 flights take off from Maryland and land in Ontario each day. The most common flight departure time for this route is 9:00AM, with 60% of daily flights taking off at noon.

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

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

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

As of September 2025, there are 6 operators available to choose from for flights from Maryland to Ontario Airport.

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

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Maryland 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.

$93 Cheap Flights from Maryland to Ontario in 2025/26

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Find the cheapest flights from Maryland to Los Angeles

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

6:19 am - 11:10 amPHL-ONT

7h 51m1 stop

5:53 am - 3:49 amONT-PHL

18h 56m1 stop

$164Frontier

Find Deal

Thu, Oct 30 - Sun, Nov 2

9:42 pm - 7:49 amBWI-ONT

13h 07m1 stop

6:53 am - 5:44 pmONT-BWI

7h 51m1 stop

$165Frontier

Find Deal

Fri, Oct 24 - Sun, Oct 26

6:21 pm - 8:42 pmBWI-ONT

29h 21m1 stop

1:46 pm - 10:28 amONT-BWI

17h 42m1 stop

$218Multiple Airlines

Find Deal

Mon, Oct 27 - Mon, Nov 3

7:50 am - 8:42 pmBWI-ONT

15h 52m1 stop

10:47 pm - 4:30 amONT-BWI

26h 43m1 stop

$221Multiple Airlines

Find Deal

Wed, Oct 22 - Sun, Oct 26

4:49 pm - 11:04 pmBWI-ONT

9h 15m1 stop

10:25 pm - 11:12 amONT-BWI

9h 47m1 stop

$277Delta

Find Deal

Wed, Nov 26 - Wed, Dec 3

2:10 pm - 11:52 pmBWI-ONT

12h 42m2 stops

1:00 pm - 11:42 pmONT-BWI

7h 42m1 stop

$282Delta

Find Deal

Tue, Jan 27 - Tue, Feb 10

7:00 am - 3:21 pmBWI-ONT

11h 21m1 stop

6:00 am - 5:55 pmONT-BWI

8h 55m1 stop

$284Alaska Airlines

Find Deal

Sat, Dec 6 - Sat, Feb 7

6:25 am - 12:37 pmIAD-ONT

9h 12m1 stop

4:11 pm - 6:23 amONT-IAD

11h 12m1 stop

$300Alaska Airlines

Find Deal

Wed, Oct 15 - Tue, Oct 28

4:12 pm - 8:44 pmBWI-ONT

7h 32m1 stop

1:29 pm - 10:57 pmONT-BWI

6h 28m1 stop

$311United Airlines

Find Deal

Sat, Nov 8 - Sat, Nov 15

8:20 am - 5:23 pmIAD-ONT

12h 03m2 stops

6:38 pm - 7:30 amONT-IAD

9h 52m1 stop

$373United Airlines

Find Deal

Wed, Oct 22 - Sun, Oct 26

Frontier flights from Maryland to Ontario

Our best Frontier deals on Maryland to Ontario flight tickets

Frontier

Oct 30

PHL6:19 amPhiladelphia

7h 51m

1 stop

ONT11:10 amOntario

Nov 2

ONT5:53 amOntario

18h 56m

1 stop

PHL3:49 amPhiladelphia

$164

Find similar

Frontier

Oct 24

BWI9:42 pmBaltimore/Washington

13h 07m

1 stop

ONT7:49 amOntario

Oct 26

ONT6:53 amOntario

7h 51m

1 stop

BWI5:44 pmBaltimore/Washington

$165

Find similar

Frontier

Nov 7

PHL8:00 amPhiladelphia

13h 28m

1 stop

ONT6:28 pmOntario

Nov 9

ONT6:45 amOntario

19h 04m

1 stop

PHL4:49 amPhiladelphia

$166

Find similar

Alaska Airlines flights from Maryland to Ontario

Our best Alaska Airlines deals on Maryland to Ontario flight tickets

Alaska Airlines

Dec 6

BWI7:00 amBaltimore/Washington

11h 21m

1 stop

ONT3:21 pmOntario

Feb 7

ONT6:00 amOntario

8h 55m

1 stop

BWI5:55 pmBaltimore/Washington

$284

Find similar

Alaska Airlines

Oct 15

IAD6:25 amWashington, D.C. Dulles Intl

9h 12m

1 stop

ONT12:37 pmOntario

Oct 28

ONT4:11 pmOntario

11h 12m

1 stop

IAD6:23 amWashington, D.C. Dulles Intl

$300

Find similar

Alaska Airlines

Nov 5

BWI7:38 amBaltimore/Washington

10h 39m

1 stop

ONT3:17 pmOntario

Nov 8

ONT6:00 amOntario

9h 16m

1 stop

BWI6:16 pmBaltimore/Washington

$302

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

Thu 10/30

6:19 am-11:10 am

1 stop7h 51m

Ontario

Sun 11/2

5:53 am-3:49 am

1 stop18h 56m

$164

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Fri 10/24

9:42 pm-7:49 am

1 stop13h 07m

Ontario

Sun 10/26

6:53 am-5:44 pm

1 stop7h 51m

$165

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Mon 10/27

6:21 pm-8:42 pm

1 stop29h 21m

Ontario

Mon 11/3

1:46 pm-10:28 am

1 stop17h 42m

$218

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Wed 10/22

7:50 am-8:42 pm

1 stop15h 52m

Ontario

Sun 10/26

10:47 pm-4:30 am

1 stop26h 43m

$221

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Wed 11/26

4:49 pm-11:04 pm

1 stop9h 15m

Ontario

Wed 12/3

10:25 pm-11:12 am

1 stop9h 47m

$277

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Tue 1/27

2:10 pm-11:52 pm

2 stops12h 42m

Ontario

Tue 2/10

1:00 pm-11:42 pm

1 stop7h 42m

$282

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Sat 12/6

7:00 am-3:21 pm

1 stop11h 21m

Ontario

Sat 2/7

6:00 am-5:55 pm

1 stop8h 55m

$284

Washington, D.C.Ontario

IAD - ONT

IADONT

Washington, D.C. Dulles Intl

Wed 10/15

6:25 am-12:37 pm

1 stop9h 12m

Ontario

Tue 10/28

4:11 pm-6:23 am

1 stop11h 12m

$300

BaltimoreOntario

BWI - ONT

BWIONT

Baltimore/Washington

Sat 11/8

4:12 pm-8:44 pm

1 stop7h 32m

Ontario

Sat 11/15

1:29 pm-10:57 pm

1 stop6h 28m

$311

Washington, D.C.Ontario

IAD - ONT

IADONT

Washington, D.C. Dulles Intl

Wed 10/22

8:20 am-5:23 pm

2 stops12h 03m

Ontario

Sun 10/26

6:38 pm-7:30 am

1 stop9h 52m

$373

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How to get the cheapest flight ticket from Maryland 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

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Other information

What is the cheapest month to fly to Ontario?

In general, April is the cheapest month to fly from Maryland to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $326. If you aren’t able to travel during the month of April, then book flights to Ontario from Maryland during October instead. Flights to Ontario in October, while not as cheap as those in April, still average around $340.

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

The cheapest day to depart on your flight to Ontario is on a Tuesday when prices can be found for as low as $323. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Maryland to Ontario for around $480.

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

In the afternoon is the cheapest time of day to fly from Maryland to Ontario when you can find flight prices for as low as $366. Flying to Ontario in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $431 on average. Flights to Ontario from Maryland in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Maryland to Ontario flight route?

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

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

You are more likely to see cheaper flights to Ontario from Maryland when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $441 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from Maryland for as low as $337 on momondo.

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

There is only 1 cabin class available to choose from on Maryland 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 Maryland to Ontario flights?

You could potentially save up to 9% on your flight if you consider stops on a Maryland to Ontario flight.

Cheap Maryland to Ontario flight deals and tips

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

Best Price Found	$176
Fastest flight time	5h 15m
Direct flights	Mon, Tue, Wed, Thu, Sat and Sun
Airports in Ontario	1 airport

The best one-way flight to Ontario from Maryland in the past 72 hours is $176. The best round-trip flight deal from Maryland to Ontario found on momondo in the last 72 hours is $381.

The fastest flight from Maryland to Ontario takes 5h 15m

Direct flights go from Maryland to Ontario on Monday, Tuesday, Wednesday, Thursday, Saturday and Sunday. The only airline offering direct flights is Southwest.

There is 1 airport near Ontario: Ontario (ONT)

Search flight deals

When did momondo last update prices for flights from Maryland to Ontario Airport?
Prices for flights from Maryland to Ontario Airport were last updated today.
How many operators does momondo search for flights from Maryland to Ontario Airport?
As of September 2025, there are 6 operators available to choose from for flights from Maryland to Ontario Airport.
How old do you have to be to fly from Maryland to Ontario Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Maryland 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 Maryland to Ontario?
Based on momondo bookings for flights between Maryland and Ontario, the leading plane model is Boeing 737-800 Passenger/BBJ2 (winglets), making up 28.09% of the total bookings. Other popular models include Boeing 737 MAX 8 with 16.85%, Airbus A321-100/200 with 12.36%, and Boeing 737-700 Passenger/BBJ1 (winglets) with 11.24%.

Best airlines flying from Maryland to Ontario

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

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $188	Free Cancellation	Rating 5.8 3,166 reviews	Search Frontier flights
United Airlines	PriceFrom $218	Free Cancellation	Rating 7.4 8,922 reviews	Search United Airlines flights
American Airlines	PriceFrom $336	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Southwest	PriceFrom $336	Free Cancellation	Rating 8.0 4,244 reviews	Search Southwest flights
Delta	PriceFrom $346	Free Cancellation	Rating 7.9 7,971 reviews	Search Delta flights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Maryland to Ontario. momondo saves you time and could save you money on your trip.

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

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

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

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

Of course. momondo tracks the price of Maryland to Ontario flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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.

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Cheap flights from Maryland to Los Angeles from $93

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

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How to get the cheapest flight ticket from Maryland 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

What is the cheapest month to fly to Ontario?

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

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

What is the cheapest Maryland to Ontario flight route?

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

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

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

There is only 1 cabin class available to choose from on Maryland 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 Maryland to Ontario flights?

You could potentially save up to 9% on your flight if you consider stops on a Maryland to Ontario flight.

What is the cheapest airline that flies from Maryland to Ontario?

Frontier, American Airlines, and Alaska Airlines are the most popular carriers operating from Maryland to Ontario

What airlines fly to Ontario?

How many flights depart from Maryland to Ontario on average per day?

As of September 2025, 1 flights take off from Maryland and land in Ontario each day. The most common flight departure time for this route is 9:00AM, with 60% of daily flights taking off at noon.

How many flights depart from Maryland to Ontario on average per week?

The number of flights available between Maryland and Ontario is 7 per week as of September 2025. The most frequent departure day is Mon, with 14% of weekly flights leaving on this day.

How long does it take to fly to Ontario?

Average flight duration from Maryland to Ontario depends on which airport you fly into and out of. Flying from Baltimore to Los Angeles is 5h 27m on average, while flying from Salisbury to Los Angeles is 7h 32m on average. Los Angeles is the most popular airport in Ontario.

Cheap Maryland to Ontario flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in Ontario

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

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

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

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

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

Best airlines flying from Maryland to Ontario

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

Why use momondo?

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

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

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

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

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