ONT - BWI

$93 Find Cheap Flights from Ontario to Baltimore - Compare and Save

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Everything you should know

Cheapest round-trip
$222
Typical prices: $378-$548
Frontier
Sat 12/1Wed 12/5
ONT - BWI • 2 stops
Cheapest one-way
$93
Typical prices: $214-$313
Frontier
Sat 12/1
ONT - BWI • 2 stops
Nonstop flights
Not available
There are currently no direct flights between Ontario and Baltimore. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to book
17 weeks
in advance
Our data shows that travelers who book at least 17 weeks in advance save around 31% compared to booking last minute.
Insights
Insights
When to travel
February
Cheapest • 18% price drop
July
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Portland (PDX)
Cheapest • Avg $357 (round-trip)
Phoenix Sky Harbor Intl (PHX)
Shortest trip • 7h 09m (one-way)
Insights
Insights
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Flight Deals

Cheap Flights from Ontario to Baltimore (ONT-BWI)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Baltimore

Tue, Dec 1 - Tue, Dec 8
Frontier Logo
11:30 am - 12:11 pmONT  Ontario-BWI Baltimore/Washington
21h 41m2 stops Denver Intl Dallas/Fort Worth
Frontier Logo
8:41 pm - 10:45 amBWI  Baltimore/Washington-ONT Ontario
17h 04m2 stops Atlanta Hartsfield-Jackson Denver Intl
$251Frontier
Thu, Jan 21 - Mon, Jan 25
Frontier Logo
7:10 pm - 9:21 amONT  Ontario-BWI Baltimore/Washington
11h 11m1 stop Dallas/Fort Worth
Frontier Logo
10:16 am - 6:15 pmBWI  Baltimore/Washington-ONT Ontario
10h 59m1 stop Dallas/Fort Worth
$252Frontier
Thu, Nov 26 - Tue, Dec 1
Multiple Airlines Logo
2:01 pm - 11:32 amONT  Ontario-BWI Baltimore/Washington
18h 31m2 stops Las Vegas Harry Reid Intl Minneapolis St Paul
Multiple Airlines Logo
6:00 am - 6:11 pmBWI  Baltimore/Washington-ONT Ontario
15h 11m3 stops Atlanta Hartsfield-Jackson Houston George Bush Intcntl Las Vegas Harry Reid Intl
$353Multiple Airlines
Thu, Feb 11 - Mon, Feb 15
Southwest Logo
12:20 pm - 11:35 pmONT  Ontario-BWI Baltimore/Washington
8h 15m1 stop Houston Hobby
Southwest Logo
6:20 am - 10:40 amBWI  Baltimore/Washington-ONT Ontario
7h 20m1 stop Phoenix Sky Harbor Intl
$380Southwest
Tue, Dec 8 - Fri, Dec 11
Southwest Logo
1:55 pm - 12:50 amONT  Ontario-BWI Baltimore/Washington
7h 55m1 stop Denver Intl
Southwest Logo
8:15 am - 2:05 pmBWI  Baltimore/Washington-ONT Ontario
8h 50m1 stop Denver Intl
$385Southwest
Sat, Feb 13 - Sat, Feb 20
United Airlines Logo
5:00 am - 3:10 pmONT  Ontario-BWI Baltimore/Washington
7h 10m1 stop Denver Intl
United Airlines Logo
4:13 pm - 9:17 pmBWI  Baltimore/Washington-ONT Ontario
8h 04m1 stop Denver Intl
$385United Airlines
Fri, Dec 11 - Mon, Dec 14
Delta Logo
5:04 pm - 6:00 amONT  Ontario-BWI Baltimore/Washington
9h 56m1 stop Salt Lake City
Delta Logo
7:15 am - 12:17 pmBWI  Baltimore/Washington-ONT Ontario
8h 02m1 stop Salt Lake City
$385Delta
Thu, Nov 26 - Thu, Dec 3
Delta Logo
7:05 am - 5:25 pmONT  Ontario-BWI Baltimore/Washington
7h 20m1 stop Atlanta Hartsfield-Jackson
Delta Logo
2:00 pm - 6:38 pmBWI  Baltimore/Washington-ONT Ontario
7h 38m1 stop Atlanta Hartsfield-Jackson
$385Delta
Mon, Dec 7 - Wed, Dec 9
Alaska Airlines Logo
5:01 pm - 5:37 amONT  Ontario-BWI Baltimore/Washington
9h 36m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
7:00 am - 4:05 pmBWI  Baltimore/Washington-ONT Ontario
12h 05m1 stop Seattle/Tacoma Intl
$385Alaska Airlines
Sat, Dec 5 - Mon, Dec 7
United Airlines Logo
5:45 am - 4:17 pmONT  Ontario-BWI Baltimore/Washington
7h 32m1 stop Houston George Bush Intcntl
United Airlines Logo
4:22 pm - 9:11 pmBWI  Baltimore/Washington-ONT Ontario
7h 49m1 stop Denver Intl
$430United Airlines
Booking Insights

Price, demand and travel trends for Ontario to Baltimore flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

How much is a round-trip flight from Ontario to Baltimore?

Round-trip flights from Ontario to Baltimore typically range from $378 to $548. The lowest price found in the past 5 days was $222, on Frontier.

What's the cheapest day of the week to fly from Ontario to Baltimore?

Based on deals KAYAK users found in the last 12 months, Thursday is the cheapest day of the week to fly from Ontario to Baltimore. It’s 8% cheaper than the average day, while Sunday is the most expensive, with prices 34% higher.

What’s the cheapest month to fly from Ontario to Baltimore?

•February is the cheapest month to fly from Ontario to Baltimore at $376 round-trip.
•October ($564) and June ($550) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 50% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from Ontario to Baltimore the cheapest?

Flights from Ontario to Baltimore are cheapest 17 weeks before departure. Booking in this window typically costs about 31% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

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Expert advice

Expert advice for your flight from Ontario to Baltimore

 
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Jennifer Simonson

Jennifer Simonson

Expert on ONT

Jennifer Simonson is driven by her lifelong commitment to exploring the globe. Her insatiable curiosity had led her to immerse herself into diverse locations like Oklahoma City and Pismo. Her hotel recommendations are the result of the myriad hotels she's stayed at across her travels. Along her journey, she cherishes engaging conversations with locals, indulging in the finest ice cream, trying her hand at surfing, and embarking on nature-filled hikes.

Read more
Harriet Baskas

Harriet Baskas

Expert on BWI

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more

Key details for Ontario to Baltimore flights

Low season

October

Cheapest flight

$93
Beat the crowds with an average 43% drop in travelers.
The most popular month to fly with an average 31% increase in travelers.
One-way flight from Ontario to Baltimore

When to book flights from Ontario to Baltimore

Are your dates flexible? Find out the best times to travel from Ontario to Baltimore based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Ontario to Baltimore flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What cabin classes can I book on flights from Ontario to Baltimore?

    Two cabin classes are available on flights from Ontario to Baltimore:

    • Economy Class
    • First Class

  • How long is a flight from Ontario to Baltimore?

    A nonstop flight from Ontario to Baltimore takes 00m, covering 2,276 miles.

  • Do I need a passport to fly from Ontario to Baltimore?

    No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID or another TSA-accepted form of identification.

  • How much should I expect to pay for a Ontario to Baltimore flight?

    Round-trip flights from Ontario to Baltimore range from $378 to $548, with an average of $457 over the past 12 months. Anything below $378 counts as a good deal.

  • How expensive are last-minute Ontario to Baltimore flights?

    Last-minute fares on this route (booked within two weeks of departure) run 10% above the $457 route average. Book 17 weeks before departure for the lowest fares.

  • How much can I save by taking a layover when flying from Ontario to Baltimore?

    On this route, layover flights are cheaper than nonstop options on average. Layover fares average $357 round-trip via Portland (PDX), compared to $486 for nonstop.

  • Which aircraft model is used most often on flights from Ontario to Baltimore?

    The Boeing 737-800 Passenger/BBJ2 (winglets) family is used most often on this route, operated mainly by Southwest and Alaska Airlines. Other aircraft seen on the route include Boeing 737 MAX 9 variants.

  • Have flight prices from Ontario to Baltimore changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $251 to $2,445. That means the highest observed fare was about 10x higher than the lowest one.

  • How are flight prices from Ontario to Baltimore looking right now?

    One-way fares from Ontario to Baltimore are currently lower than usual. Average one-way flight prices are about $181, which is 34% below the typical average for this route.

  • What car rental options are available at Baltimore/Washington Airport (BWI)?

    Baltimore/Washington Airport (BWI) hosts 5 major car rental companies, with daily rates averaging $72 for economy cars. Top options include:

    • NextCar
    • Hertz
    • Dollar
    • Budget
    • Sixt

  • Which airports can I use when flying from Ontario to Baltimore?

    Flights from Ontario to Baltimore usually depart from Ontario (ONT) and arrive at Baltimore/Washington (BWI).

  • Which airports do connecting flights from Ontario to Baltimore pass through?

    One-stop flights from Ontario to Baltimore most commonly connect through:

    • Houston George Bush Intcntl (IAH) - 22% of one-stop connections
    • Denver Intl (DEN) - 21% of one-stop connections
    • Dallas/Fort Worth (DFW) - 20% of one-stop connections
    • Atlanta Hartsfield-Jackson (ATL) - 14% of one-stop connections

  • Can I save money by using flexible dates for flights from Ontario to Baltimore?

    Yes. Flexible dates can save you up to 32% on flights from Ontario to Baltimore. Thursday is the cheapest departure day at $421 round-trip on average, while Sunday is the most expensive at $613, a difference of $192.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • How much time can I save by choosing a different layover airport from Ontario to Baltimore?

    Flying via Phoenix Sky Harbor Intl (PHX) gives the shortest average 1-stop total travel time at 7h 09m, compared with 7h 16m via Chicago Midway (MDW) and 7h 17m via Denver Intl (DEN).

  • What is the time difference between Ontario and Baltimore?

    Baltimore is 3 hours ahead of Ontario (Eastern Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in Baltimore?

    Some of the most popular sights in Baltimore are M&T Bank Stadium, National Aquarium Baltimore and Oriole Park At Camden Yards. These are among the most viewed places in Baltimore on KAYAK.

Your guide to booking Ontario to Baltimore flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Thursday departure and avoid flying on Sunday. On this route, Thursday flights average $421, about $192 less than Sunday fares (31% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 17 weeks before you fly. On this route, that window historically saves about 31% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Ontario to Baltimore trip for February. Fares historically average $376 round-trip in that month - typically $188 less than the most expensive month, which is October (based on the last 12 months).
  • If you have the time, taking a 1-stop flight through Portland Airport (PDX) can be cheaper than flying direct. The cheapest layover option averages $357 round-trip on this route - about $128 less than direct flights (based on the last 12 months).

More options for your flight from Ontario to Baltimore

Complete your trip to Baltimore with a hotel stay or car rental

Car rentals in Baltimore
Hotels in Baltimore
Vacations in Baltimore