ONT - BWI

$117 Find Cheap Flights from Ontario to Baltimore - Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$226
Typical prices: $382-$547
Frontier
Sun 9/23Fri 9/28
ONT - BWI • 1 stop
Cheapest one-way
$117
Typical prices: $205-$291
Frontier
Sat 9/15
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 • 17% price drop
July
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Salt Lake City (SLC)
Cheapest • Avg $267 (round-trip)
Houston Hobby (HOU)
Shortest trip • 7h 07m (one-way)
Insights
Insights
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We hope you love your trip to Baltimore!
Flight Deals
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Expert advice
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

Wed, Sep 23 - Mon, Sep 28
Frontier Logo
7:11 pm - 11:40 amONT  Ontario-BWI Baltimore/Washington
13h 29m1 stop Dallas/Fort Worth
Frontier Logo
10:20 am - 11:47 pmBWI  Baltimore/Washington-ONT Ontario
40h 27m2 stops Chicago O'Hare Intl Denver Intl
$226Frontier
Wed, Sep 23 - Mon, Sep 28
Frontier Logo
7:11 pm - 11:40 amONT  Ontario-BWI Baltimore/Washington
13h 29m1 stop Dallas/Fort Worth
Frontier Logo
10:20 am - 11:47 pmBWI  Baltimore/Washington-ONT Ontario
40h 27m2 stops Chicago O'Hare Intl Denver Intl
$227Frontier
Tue, Sep 22 - Thu, Sep 24
Multiple Airlines Logo
3:14 pm - 6:30 amONT  Ontario-BWI Baltimore/Washington
12h 16m1 stop Seattle/Tacoma Intl
Multiple Airlines Logo
1:29 pm - 6:39 pmBWI  Baltimore/Washington-ONT Ontario
8h 10m1 stop Dallas/Fort Worth
$293Multiple Airlines
Thu, Sep 24 - Tue, Sep 29
Multiple Airlines Logo
6:45 pm - 8:30 pmONT  Ontario-BWI Baltimore/Washington
22h 45m1 stop Houston George Bush Intcntl
Multiple Airlines Logo
7:50 am - 2:16 pmBWI  Baltimore/Washington-ONT Ontario
9h 26m1 stop Seattle/Tacoma Intl
$293Multiple Airlines
Wed, Oct 28 - Thu, Oct 29
Southwest Logo
2:00 pm - 11:20 pmONT  Ontario-BWI Baltimore/Washington
6h 20m1 stop Denver Intl
Southwest Logo
11:40 am - 6:20 pmBWI  Baltimore/Washington-ONT Ontario
9h 40m1 stop San Jose
$347Southwest
Tue, Dec 15 - Wed, Dec 30
Southwest Logo
12:30 pm - 10:45 pmONT  Ontario-BWI Baltimore/Washington
7h 15m1 stop Houston Hobby
Southwest Logo
6:15 am - 11:50 amBWI  Baltimore/Washington-ONT Ontario
8h 35m1 stop Phoenix Sky Harbor Intl
$347Southwest
Thu, Jan 14 - Sat, Jan 23
American Airlines Logo
10:31 am - 10:52 pmONT  Ontario-BWI Baltimore/Washington
9h 21m1 stop Dallas/Fort Worth
American Airlines Logo
4:57 pm - 10:45 pmBWI  Baltimore/Washington-ONT Ontario
8h 48m1 stop Dallas/Fort Worth
$347American Airlines
Thu, Jan 21 - Mon, Jan 25
American Airlines Logo
6:00 am - 5:51 pmONT  Ontario-BWI Baltimore/Washington
8h 51m1 stop Chicago O'Hare Intl
American Airlines Logo
4:57 pm - 10:45 pmBWI  Baltimore/Washington-ONT Ontario
8h 48m1 stop Dallas/Fort Worth
$347American Airlines
Tue, Nov 10 - Sat, Nov 14
Delta Logo
7:00 am - 5:23 pmONT  Ontario-BWI Baltimore/Washington
7h 23m1 stop Atlanta Hartsfield-Jackson
Delta Logo
7:00 am - 12:10 pmBWI  Baltimore/Washington-ONT Ontario
8h 10m1 stop Salt Lake City
$347Delta
Sat, Dec 12 - Sat, Jan 9
Delta Logo
7:00 am - 5:03 pmONT  Ontario-BWI Baltimore/Washington
7h 03m1 stop Atlanta Hartsfield-Jackson
Delta Logo
6:00 am - 11:27 amBWI  Baltimore/Washington-ONT Ontario
8h 27m1 stop Atlanta Hartsfield-Jackson
$347Delta
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 from Ontario to Baltimore with more confidence.

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

Round-trip flights from Ontario to Baltimore start at $226. Prices are below average for this route right now, with typical round-trip fares ranging from $382 to $547. The lowest price found in the past 5 days was $226 on Frontier.

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

Thursday is the cheapest day of the week to fly from Ontario to Baltimore, it is 8% cheaper than the average day. Sunday is the most expensive day with flight prices 21% higher than average. Based on deals found by KAYAK users in the last 12 months.

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

  • February is the cheapest month to fly from Ontario to Baltimore at $376 round-trip.
  • June ($550) and December ($533) are the most expensive months.
  • The price difference between flying in the cheapest and most expensive months is 46% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are prices 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

$117
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly with an average 8% increase in price.
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 route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • Which airlines offer extra legroom and free seat selection on Ontario to Baltimore flights?

    Among airlines operating Ontario to Baltimore flights:

    • Southwest: offers free seat selection

    Extra legroom and free seat selection availability depends on fare class and route.

  • 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 airlines include bags at no extra cost on Ontario to Baltimore flights?

    Here are some options for this route, based on selected ticket types and cabin classes:

    • Southwest: a cabin bag in Economy Class class
    • JetBlue: a cabin bag in Economy Class class

    Bag allowance can vary by ticket type, cabin class, route and airline, so travelers should check the fare details before booking.

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

    Only Economy Class is available on flights from Ontario to Baltimore.

  • 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 $267 round-trip via Salt Lake City (SLC), compared to $503 for nonstop.

  • What is the standard checked-bag allowance on flights from Ontario to Baltimore?

    There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $45–$90 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

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

    The Airbus A318/A319/A320/A321 family is used most often on this route, operated mainly by JetBlue and Spirit Airlines. Other aircraft seen on the route include Boeing 737-800 Passenger/BBJ2 (winglets) variants.

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

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

    • Denver Intl (DEN) - 28% of one-stop connections
    • Houston George Bush Intcntl (IAH) - 22% of one-stop connections
    • Dallas/Fort Worth (DFW) - 20% of one-stop connections
    • Atlanta Hartsfield-Jackson (ATL) - 10% of one-stop connections

    Denver Intl (DEN) handles the largest share of one-stop connections on this route.

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

    Yes. Being flexible with your travel dates can save you up to 24% on the Ontario to Baltimore route. Thursday is the cheapest departure day at $421 round-trip on average, while Sunday is the most expensive at $553, a difference of $132. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What popular places can I visit in Baltimore?

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

  • How long is a flight from Ontario to Baltimore?

    A nonstop flight from Ontario to Baltimore takes 0h 00m, covering 2,276 miles.

  • What are the earliest and latest flights from Ontario to Baltimore?

    These are the earliest and latest flight times available from Ontario to Baltimore:

    • Earliest: departs at 12:00 am and lands at 12:00 am
    • Latest: departs at 12:00 am and lands at 12:00 am.

    The flight takes about 0h 00m.

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

    Last-minute fares on this route - booked within 2 weeks of departure - run 10% above the route average of $455. Book 17 weeks before departure for the lowest fares.

  • 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.

  • 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 $226 to $2,199. 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 $163, which is 37% below the typical average for this route.

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

    Flying via Houston Hobby (HOU) gives the shortest average 1-stop total travel time at 7h 07m, compared with 7h 09m via Phoenix Sky Harbor Intl (PHX) and 7h 14m via Austin Bergstrom (AUS).

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

    Baltimore/Washington Airport (BWI) hosts 5 major car rental companies, with daily rates starting from around $25 for economy cars. Top options include:
    · NextCar
    · Hertz
    · Dollar
    · Thrifty
    · Budget

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

    Round-trip flights from Ontario to Baltimore range from $382 to $547, with an average of $455 over the past 12 months. Anything below $382 counts as a good deal.

  • Which airlines offer Wi-Fi on Ontario to Baltimore flights?

    JetBlue is the only airline on the Ontario to Baltimore route offering in-flight Wi-Fi. Pricing depends on fare class.

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 can be flexible, aim for a Thursday departure instead of Sunday. On this route, Thursday flights average $421 - about $132 less than Sunday (24% 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 $174 less than the most expensive month, which is June (based on the last 12 months).
  • If you have the time, taking a 1-stop flight through Salt Lake City Airport (SLC) can be cheaper than flying direct. The cheapest layover option averages $267 round-trip on this route - about $236 less than direct flights (based on the last 12 months).

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

Information on your arrival and departure airports

Ontario (ONT)
Baltimore (BWI)