How popular is this Ontario to Baltimore flight route?

This flight path from Ontario to Baltimore/Washington was viewed by 7 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

How long is the flight from Ontario to Baltimore?

Airlines like Delta fly from Ontario to Baltimore in about 13h 14m. The time it takes to get you to your destination can typically vary by up to . The distance from Ontario to Baltimore is about 2276 mi.

What are the cheapest airlines flying from Ontario to Baltimore round-trip?

Our cheapest airline available from Ontario to Baltimore is Spirit Airlines. Our recent data shows that you can find tickets from as low as $72 on this airline. Additional options worth looking into are Frontier and Delta, starting at $136 and $214 round-trip. These flights start at 83% lower than the current average price 3 months from now.

What are the cheapest airlines to fly from Ontario to Baltimore one-way?

$65 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Delta and Southwest, with prices starting from $144 and $159, respectively.

In terms of precipitation, rainfall in Baltimore ranges from 2.9 - 4.1 inches per month. July is typically the wettest month, when rainfall can reach 4.1 in. February is typically the driest time to visit Baltimore when rainfall is around 2.9 in.

If weather is an important factor for your trip to Baltimore, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 77.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 33.8 F).

What are the cheapest flights from Ontario to Baltimore?

Looking for the cheapest flight from Ontario to Baltimore? While on average our users pay $445, our data indicates the cheapest price to be $196. The most popular route (Ontario - Baltimore/Washington), is priced around $217.

What are the most popular airlines that fly from Ontario to Baltimore?

Southwest, American Airlines and Delta are the most popular airlines when flying from Ontario to Baltimore.

Most accurate provider : When it comes to deals on Ontario-Baltimore flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Baltimore flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Ontario-Baltimore flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Ontario-Baltimore flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Baltimore flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Can I find deals for flights from Ontario to Baltimore that include hotel bookings?

Yes. In addition to deals on Ontario to Baltimore flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Ontario to Baltimore?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Baltimore.

Can I find deals for business class flights from Ontario to Baltimore?

Yes. Cheapflights offers flight deals from Ontario to Baltimore by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$84+ Flights from Ontario to Baltimore

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from Ontario to Baltimore with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Ontario to Baltimore/Washington are usually found in May or April, booked 71 days in advance, depart on a Thursday or Monday and return on a Friday

Cheap flight deals from Ontario to Baltimore

Cheapest flights from Ontario to Baltimore
Explore the most affordable flight options available from Ontario to Baltimore. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

Wed 12/246:20 pmONT - BWI

1 stop14h 24mFrontier

Sat 1/39:08 pmBWI - ONT

1 stop13h 16mFrontier

Deal found 12/15

$296

Wed 12/316:20 pmONT - BWI

1 stop14h 24mFrontier

Sat 1/39:08 pmBWI - ONT

1 stop13h 16mFrontier

Deal found 12/17

$297

Mon 12/296:20 pmONT - BWI

1 stop14h 09mFrontier

Sat 1/39:08 pmBWI - ONT

1 stop13h 16mFrontier

Deal found 12/16

$308

Tue 12/238:19 amONT - BWI

1 stop8h 34mFrontier

Sat 1/39:08 pmBWI - ONT

1 stop13h 16mFrontier

Deal found 12/16

$328

Wed 12/246:20 pmONT - BWI

1 stop14h 24mFrontier

Mon 12/299:30 pmBWI - ONT

1 stop12h 54mFrontier

Deal found 12/16

$341

Wed 12/316:20 pmONT - BWI

1 stop14h 24mFrontier

Sun 1/49:03 pmBWI - ONT

1 stop13h 21mFrontier

Deal found 12/17

$363

Sun 12/286:37 pmONT - BWI

2 stops19h 10mFrontier

Wed 12/317:44 pmBWI - ONT

1 stop16h 09mFrontier

Deal found 12/16

$376

Fri 12/265:10 pmONT - BWI

1 stop9h 35mDelta

Fri 1/27:00 amBWI - ONT

1 stop8h 29mDelta

Deal found 12/16

$382

Tue 12/238:19 amONT - BWI

1 stop8h 34mFrontier

Sun 1/49:03 pmBWI - ONT

1 stop13h 21mFrontier

Deal found 12/17

$397

Best flights from Ontario to Baltimore
Discover carefully curated flight deals from Ontario to Baltimore that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 18, 2025.

Fri 1/98:31 amONT - BWI

1 stop24h 36mMultiple Airlines

Sun 1/118:08 pmBWI - ONT

1 stop28h 15mMultiple Airlines

Deal found 12/17

$245

Thu 2/57:30 amONT - BWI

2 stops13h 14mDelta

Sun 2/81:02 pmBWI - ONT

2 stops12h 42mDelta

Deal found 12/16

$296

Fri 1/166:39 pmONT - BWI

1 stop9h 53mUnited Airlines

Wed 1/214:10 pmBWI - ONT

1 stop7h 48mUnited Airlines

Deal found 12/17

$339

Thu 2/56:00 amONT - BWI

1 stop9h 14mAlaska Airlines

Mon 2/97:14 pmBWI - ONT

1 stop22h 54mAlaska Airlines

Deal found 12/16

$346

Fri 1/168:32 amONT - BWI

1 stop24h 31mMultiple Airlines

Wed 1/218:08 pmBWI - ONT

2 stops31h 12mMultiple Airlines

Deal found 12/17

$272

Tue 1/137:30 amONT - BWI

2 stops13h 14mDelta

Tue 1/206:00 amBWI - ONT

2 stops10h 56mDelta

Deal found 12/16

$317

Mon 1/56:39 pmONT - BWI

1 stop7h 35mUnited Airlines

Wed 1/78:23 amBWI - ONT

1 stop7h 24mUnited Airlines

Deal found 12/16

$339

Sat 2/710:30 pmONT - BWI

1 stop8h 35mDelta

Tue 2/101:02 pmBWI - ONT

2 stops27h 54mDelta

Deal found 12/17

$321

Tue 1/277:30 amONT - BWI

2 stops14h 11mDelta

Wed 1/286:00 amBWI - ONT

2 stops10h 56mDelta

Deal found 12/15

$336

Sat 1/177:30 amONT - BWI

2 stops13h 14mDelta

Wed 1/217:00 amBWI - ONT

1 stop8h 16mDelta

Deal found 12/15

$341

Last-minute flights from Ontario to Baltimore
Discover last-minute flight deals from Ontario to Baltimore. Data last updated December 18, 2025 and is based on user searches.

Fri 1/98:31 amONT - BWI

1 stop24h 36mMultiple Airlines

Sun 1/115:25 pmBWI - ONT

2 stops23h 14mMultiple Airlines

Deal found 12/17

$250

Fri 1/98:31 amONT - BWI

1 stop9h 33mFrontier

Sun 1/117:45 pmBWI - ONT

1 stop28h 38mFrontier

Deal found 12/16

$252

Mon 1/123:46 pmONT - BWI

1 stop15h 41mMultiple Airlines

Thu 1/157:12 pmBWI - ONT

2 stops31h 47mMultiple Airlines

Deal found 12/16

$253

Wed 1/146:49 pmONT - BWI

2 stops13h 58mMultiple Airlines

Sat 1/178:08 pmBWI - ONT

1 stop21h 15mMultiple Airlines

Deal found 12/17

$278

Thu 1/157:56 pmONT - BWI

1 stop12h 43mFrontier

Thu 1/227:58 pmBWI - ONT

1 stop19h 45mFrontier

Deal found 12/16

$195

Thu 1/157:56 pmONT - BWI

1 stop12h 43mFrontier

Sun 1/1812:42 pmBWI - ONT

1 stop9h 19mFrontier

Deal found 12/16

$217

Fri 1/168:32 amONT - BWI

1 stop24h 31mFrontier

Tue 1/207:10 amBWI - ONT

2 stops10h 57mFrontier

Deal found 12/16

$245

Fri 1/168:32 amONT - BWI

1 stop24h 31mMultiple Airlines

Wed 1/218:08 pmBWI - ONT

2 stops31h 12mMultiple Airlines

Deal found 12/17

$251

Fri 1/168:32 amONT - BWI

1 stop8h 18mFrontier

Thu 1/227:58 pmBWI - ONT

1 stop19h 45mFrontier

Deal found 12/17

$254

Sun 1/2510:13 amONT - BWI

1 stop21h 30mMultiple Airlines

Mon 1/268:08 pmBWI - ONT

2 stops21h 59mMultiple Airlines

Deal found 12/15

$274

Fri 1/301:46 pmONT - BWI

1 stop17h 41mMultiple Airlines

Mon 2/28:08 pmBWI - ONT

2 stops21h 59mMultiple Airlines

Deal found 12/16

$281

One-way flights from Ontario to Baltimore
Search for one-way flight options from Ontario to Baltimore. Find affordable one-way fares based on user searches. Data last updated December 18, 2025.

Tue 2/103:22 pmONT - BWI

2 stops23h 25mFrontier

Deal found 12/16

$84

Sun 2/223:24 pmONT - BWI

2 stops16h 53mFrontier

Deal found 12/16

$85

Wed 1/146:49 pmONT - BWI

2 stops13h 58mFrontier

Deal found 12/15

$90

Wed 12/246:20 pmONT - BWI

1 stop14h 24mFrontier

Deal found 12/16

$95

Thu 1/157:56 pmONT - BWI

1 stop12h 43mFrontier

Deal found 12/17

$97

Wed 12/316:20 pmONT - BWI

1 stop14h 24mFrontier

Deal found 12/15

$98

Mon 1/193:23 pmONT - BWI

1 stop16h 04mMultiple Airlines

Deal found 12/16

$100

Fri 1/1610:18 pmONT - BWI

2 stops10h 45mFrontier

Deal found 12/15

$105

Wed 2/187:30 amONT - BWI

2 stops24h 21mFrontier

Deal found 12/16

$107

Mon 2/21:46 pmONT - BWI

1 stop17h 41mMultiple Airlines

Deal found 12/16

$109

Find flight deals from Ontario to Baltimore

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$195 (Booking.com)
One-way from	$84 (Trip.com)
Popular in	June
Cheapest in	May
Average price	$472

Provider with most accurate pricing for Ontario-Baltimore/Washington flight deals.

Search Deals

Provider most trusted by Cheapflights users for Ontario-Baltimore/Washington flights.

Search Deals

From Ontario to Baltimore/Washington

Search Deals

One-way flight from Ontario to Baltimore/Washington

Search Deals

Highest demand for flights based on searches. 3% potential increase in price ($14 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Fri 1/9

8:31 am-12:07 pm

1 stop24h 36m

Baltimore/Washington

Sun 1/11

8:08 pm-9:23 pm

1 stop28h 15m

$245

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Fri 1/16

8:32 am-12:03 pm

1 stop24h 31m

Baltimore/Washington

Wed 1/21

8:08 pm-12:20 am

2 stops31h 12m

$272

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Thu 2/5

7:30 am-11:44 pm

2 stops13h 14m

Baltimore/Washington

Sun 2/8

1:02 pm-10:44 pm

2 stops12h 42m

$296

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Tue 1/13

7:30 am-11:44 pm

2 stops13h 14m

Baltimore/Washington

Tue 1/20

6:00 am-1:56 pm

2 stops10h 56m

$317

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Sat 2/7

10:30 pm-10:05 am

1 stop8h 35m

Baltimore/Washington

Tue 2/10

1:02 pm-1:56 pm

2 stops27h 54m

$321

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Tue 1/27

7:30 am-12:41 am

2 stops14h 11m

Baltimore/Washington

Wed 1/28

6:00 am-1:56 pm

2 stops10h 56m

$336

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Fri 1/16

6:39 pm-7:32 am

1 stop9h 53m

Baltimore/Washington

Wed 1/21

4:10 pm-8:58 pm

1 stop7h 48m

$339

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Mon 1/5

6:39 pm-5:14 am

1 stop7h 35m

Baltimore/Washington

Wed 1/7

8:23 am-12:47 pm

1 stop7h 24m

$339

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Sat 1/17

7:30 am-11:44 pm

2 stops13h 14m

Baltimore/Washington

Wed 1/21

7:00 am-12:16 pm

1 stop8h 16m

$341

OntarioBaltimore

ONT - BWI

ONTBWI

Ontario

Thu 2/5

6:00 am-6:14 pm

1 stop9h 14m

Baltimore/Washington

Mon 2/9

7:14 pm-3:08 pm

1 stop22h 54m

$346

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 21 results

Compare providers for flights from Ontario to Baltimore

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Baltimore in December.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy3 stars	Trust Score*2 stars
Priceline	Price Accuracy1 star	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Ontario-Baltimore flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Baltimore flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Ontario-Baltimore flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Ontario-Baltimore flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Baltimore flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ontario to Baltimore

Have a flexible travel schedule? Discover the best time to fly to Baltimore from Ontario with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Baltimore

How far ahead should I book a flight from Ontario to Baltimore?

The best time to book flights from Ontario to Baltimore is 70 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Ontario to Baltimore?

Currently, August is the cheapest month in which you can book a flight from Ontario to Baltimore (average of $93). Flying from Ontario to Baltimore in December is currently the most expensive (average of $179). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to BWI?

One of the essential ways to save on airfare from Ontario to Baltimore is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight at noon could potentially save you up to 13% on airfare.

What is the cheapest day to fly from Ontario to Baltimore?

Travelers seeking maximum savings on their Ontario to Baltimore flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Thursday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Baltimore

Read reviews from past customers who have flown Southwest, Delta, and United Airlines from Ontario to Baltimore. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

10.0

Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

Southwest

7.9

Good

4,250 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

10.0

Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

Delta

7.9

Good

8,005 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

10.0

Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

United Airlines

7.4

Good

9,091 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

10.0

Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

American Airlines

7.2

Good

11,054 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

10.0

Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

Frontier

5.8

Fair

3,081 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

10.0

Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

Related info for your journey

How popular is this Ontario to Baltimore flight route?
This flight path from Ontario to Baltimore/Washington was viewed by 7 users in the past month. Keep an eye out for changes in search interest prior to high and low season.
How long is the flight from Ontario to Baltimore?
Airlines like Delta fly from Ontario to Baltimore in about 13h 14m. The time it takes to get you to your destination can typically vary by up to . The distance from Ontario to Baltimore is about 2276 mi.
What are the cheapest airlines flying from Ontario to Baltimore round-trip?
Our cheapest airline available from Ontario to Baltimore is Spirit Airlines. Our recent data shows that you can find tickets from as low as $72 on this airline. Additional options worth looking into are Frontier and Delta, starting at $136 and $214 round-trip. These flights start at 83% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from Ontario to Baltimore one-way?
$65 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Delta and Southwest, with prices starting from $144 and $159, respectively.
What are the cheapest flights from Ontario to Baltimore?
Looking for the cheapest flight from Ontario to Baltimore? While on average our users pay $445, our data indicates the cheapest price to be $196. The most popular route (Ontario - Baltimore/Washington), is priced around $217.
Can I find deals for flights from Ontario to Baltimore that include hotel bookings?
Yes. In addition to deals on Ontario to Baltimore flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ontario to Baltimore?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Baltimore.
Can I find deals for business class flights from Ontario to Baltimore?
Yes. Cheapflights offers flight deals from Ontario to Baltimore by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Ontario to Baltimore?
Currently, August is the cheapest month in which you can book a flight from Ontario to Baltimore (average of $93). Flying from Ontario to Baltimore in December is currently the most expensive (average of $179). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 6 airlines flying from Ontario to Baltimore

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$98	Average$224	FlexibilityNo cancel fee	On-time65%
Frontier	Cheapest$175	Average$240	FlexibilityNo cancel fee	On-time62%
United Airlines	Cheapest$276	Average$441	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$276	Average$441	FlexibilityNo cancel fee	On-timeN/A
Southwest	Cheapest$337	Average$470	FlexibilityNo cancel fee	On-time63%
American Airlines	Cheapest$346	Average$508	FlexibilityNo cancel fee	On-time71%

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$84+ Cheap flights from Ontario to Baltimore (ONT - BWI)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/10. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ontario to Baltimore with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Ontario to Baltimore/Washington are usually found in May or April, booked 71 days in advance, depart on a Thursday or Monday and return on a Friday

Cheap flight deals from Ontario to Baltimore

Cheapest flights from Ontario to BaltimoreExplore the most affordable flight options available from Ontario to Baltimore. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

Explore the most affordable flight options available from Ontario to Baltimore. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

Find flight deals from Ontario to Baltimore

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

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

Compare providers for flights from Ontario to Baltimore

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Baltimore in December.

Best time to book a flight from Ontario to Baltimore

Have a flexible travel schedule? Discover the best time to fly to Baltimore from Ontario with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Baltimore

How far ahead should I book a flight from Ontario to Baltimore?

What is the cheapest month to book a flight from Ontario to Baltimore?

What is the cheapest time of day to fly from ONT to BWI?

What is the cheapest day to fly from Ontario to Baltimore?

Reviews of airlines servicing Baltimore

Read reviews from past customers who have flown Southwest, Delta, and United Airlines from Ontario to Baltimore. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Baltimore. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

How popular is this Ontario to Baltimore flight route?

How long is the flight from Ontario to Baltimore?

What are the cheapest airlines flying from Ontario to Baltimore round-trip?

What are the cheapest airlines to fly from Ontario to Baltimore one-way?

What are the cheapest flights from Ontario to Baltimore?

Can I find deals for flights from Ontario to Baltimore that include hotel bookings?

How can I find direct flights from Ontario to Baltimore?

Can I find deals for business class flights from Ontario to Baltimore?

What is the cheapest month to book a flight from Ontario to Baltimore?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Baltimore

See prices for flight routes from nearby airports that may be better suited for you.

Top 6 airlines flying from Ontario to Baltimore

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Cheapest flights from Ontario to Baltimore
Explore the most affordable flight options available from Ontario to Baltimore. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.