BWI - ONT

$102 Find Cheap Flights from Baltimore to Ontario - Compare and Save

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Everything you should know

Cheapest round-trip
$192
Typical prices: $382-$574
Frontier
Sat 12/8Sun 12/9
BWI - ONT • 2 stops
Cheapest one-way
$102
Typical prices: $225-$312
Frontier
Sun 12/9
BWI - ONT • 2 stops
Nonstop flights
Not available
There are currently no direct flights between Baltimore and Ontario. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to book
13 weeks
in advance
Our data shows that travelers who book at least 13 weeks in advance save around 34% compared to booking last minute.
Insights
Insights
When to travel
February
Cheapest • 20% price drop
April
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Houston George Bush Intcntl (IAH)
Cheapest • Avg $326 (round-trip)
Las Vegas Harry Reid Intl (LAS)
Shortest trip • 6h 46m (one-way)
Insights
Insights
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We hope you love your trip to Ontario!
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Flight Deals

Cheap Flights from Baltimore to Ontario (BWI-ONT)

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

Recent round-trip flight deals from Baltimore to Ontario

Tue, Dec 8 - Tue, Dec 15
Frontier Logo
1:05 pm - 10:45 amBWI  Baltimore/Washington-ONT Ontario
24h 40m2 stops Dallas/Fort Worth Denver Intl
Frontier Logo
11:30 am - 12:10 pmONT  Ontario-BWI Baltimore/Washington
21h 40m2 stops Denver Intl Dallas/Fort Worth
$161Frontier
Tue, Dec 8 - Wed, Dec 9
Frontier Logo
6:00 am - 10:17 pmBWI  Baltimore/Washington-ONT Ontario
19h 17m2 stops Atlanta Hartsfield-Jackson Denver Intl
Frontier Logo
11:30 am - 8:42 amONT  Ontario-BWI Baltimore/Washington
18h 12m2 stops Denver Intl Atlanta Hartsfield-Jackson
$192Frontier
Thu, Nov 19 - Thu, Nov 26
Multiple Airlines Logo
2:07 pm - 7:08 pmBWI  Baltimore/Washington-ONT Ontario
8h 01m1 stop Dallas/Fort Worth
Multiple Airlines Logo
6:00 am - 5:36 pmONT  Ontario-BWI Baltimore/Washington
8h 36m1 stop Seattle/Tacoma Intl
$283Multiple Airlines
Thu, Nov 19 - Thu, Dec 3
Multiple Airlines Logo
2:07 pm - 7:08 pmBWI  Baltimore/Washington-ONT Ontario
8h 01m1 stop Dallas/Fort Worth
Multiple Airlines Logo
5:01 pm - 5:37 amONT  Ontario-BWI Baltimore/Washington
9h 36m1 stop Seattle/Tacoma Intl
$283Multiple Airlines
Mon, Nov 23 - Thu, Nov 26
American Airlines Logo
6:33 am - 1:19 pmBWI  Baltimore/Washington-ONT Ontario
9h 46m1 stop Dallas/Fort Worth
American Airlines Logo
1:30 pm - 8:46 amONT  Ontario-BWI Baltimore/Washington
16h 16m2 stops Phoenix Sky Harbor Intl Charlotte Douglas
$318American Airlines
Wed, Nov 18 - Tue, Dec 1
Delta Logo
7:15 am - 12:17 pmBWI  Baltimore/Washington-ONT Ontario
8h 02m1 stop Salt Lake City
Delta Logo
5:12 pm - 6:00 amONT  Ontario-BWI Baltimore/Washington
9h 48m1 stop Salt Lake City
$333Delta
Wed, Nov 18 - Wed, Dec 2
Delta Logo
7:15 am - 12:17 pmBWI  Baltimore/Washington-ONT Ontario
8h 02m1 stop Salt Lake City
Delta Logo
5:04 pm - 6:00 amONT  Ontario-BWI Baltimore/Washington
9h 56m1 stop Salt Lake City
$333Delta
Mon, Nov 23 - Wed, Dec 2
American Airlines Logo
4:04 pm - 10:36 pmBWI  Baltimore/Washington-ONT Ontario
9h 32m1 stop Dallas/Fort Worth
American Airlines Logo
7:00 am - 7:08 pmONT  Ontario-BWI Baltimore/Washington
9h 08m1 stop Dallas/Fort Worth
$333American Airlines
Sat, Dec 5 - Mon, Dec 7
Southwest Logo
7:55 am - 12:45 pmBWI  Baltimore/Washington-ONT Ontario
7h 50m1 stop Chicago Midway
Southwest Logo
6:25 pm - 5:45 amONT  Ontario-BWI Baltimore/Washington
8h 20m1 stop Phoenix Sky Harbor Intl
$343Southwest
Mon, Dec 7 - Sat, Dec 12
Southwest Logo
3:45 pm - 9:45 pmBWI  Baltimore/Washington-ONT Ontario
9h 00m2 stops Birmingham Denver Intl
Southwest Logo
1:25 pm - 10:55 pmONT  Ontario-BWI Baltimore/Washington
6h 30m1 stop Las Vegas Harry Reid Intl
$348Southwest
Booking Insights

Price, demand and travel trends for Baltimore to Ontario 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 Baltimore to Ontario?

Round-trip flights from Baltimore to Ontario typically range from $382 to $574. The lowest price found in the past 5 days was $192, on Frontier.

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

Based on deals KAYAK users found in the last 12 months, Wednesday is the cheapest day of the week to fly from Baltimore to Ontario. It’s 8% cheaper than the average day, while Thursday is the most expensive, with prices 7% higher.

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

•February is the cheapest month to fly from Baltimore to Ontario at $376 round-trip.
•June ($556) and July ($553) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 47% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from Baltimore to Ontario the cheapest?

Flights from Baltimore to Ontario are cheapest 13 weeks before departure. Booking in this window typically costs about 34% 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 Baltimore to Ontario

 
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 Baltimore to Ontario flights

Low season

October

Cheapest flight

$102
Beat the crowds with an average 50% drop in travelers.
The most popular month to fly with an average 57% increase in travelers.
One-way flight from Baltimore to Ontario

When to book flights from Baltimore to Ontario

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

Your Baltimore to Ontario 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 Baltimore to Ontario?

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

    • Economy Class
    • First Class

  • How long is a flight from Baltimore to Ontario?

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

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

    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 Baltimore to Ontario flight?

    Round-trip flights from Baltimore to Ontario range from $382 to $574, with an average of $469 over the past 12 months. Anything below $382 counts as a good deal.

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

    Last-minute fares on this route (booked within two weeks of departure) run 7% above the $469 route average. Book 13 weeks before departure for the lowest fares.

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

    On this route, layover flights are cheaper than nonstop options on average. Layover fares average $326 round-trip via Houston George Bush Intcntl (IAH), compared to $553 for nonstop.

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

    The Boeing 737-800 Passenger/BBJ2 (winglets) family is used most often on this route, operated mainly by Southwest and Hawaiian Airlines. Other aircraft seen on the route include Airbus A321neo variants.

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

    One-way fares from Baltimore to Ontario are currently lower than usual. Average one-way flight prices are about $175, which is 35% below the typical average for this route.

  • What car rental options are available at Ontario Airport (ONT)?

    Ontario Airport (ONT) hosts 5 major car rental companies, with daily rates averaging $60 for economy cars. Top options include:

    • Fox
    • Thrifty
    • Europcar
    • Dollar
    • Alamo

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

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

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

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

    • Denver Intl (DEN) - 22% of one-stop connections
    • Atlanta Hartsfield-Jackson (ATL) - 19% of one-stop connections
    • Dallas/Fort Worth (DFW) - 18% of one-stop connections
    • Houston George Bush Intcntl (IAH) - 11% of one-stop connections

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

    Yes. Flexible dates can save you up to 15% on flights from Baltimore to Ontario. Wednesday is the cheapest departure day at $435 round-trip on average, while Thursday is the most expensive at $506, a difference of $71.

    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 Baltimore to Ontario?

    Flying via Las Vegas Harry Reid Intl (LAS) gives the shortest average 1-stop total travel time at 6h 46m, compared with 7h 07m via Denver Intl (DEN) and 7h 11m via Chicago Midway (MDW).

  • What is the time difference between Baltimore and Ontario?

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

  • What popular places can I visit in Ontario?

    Some of the most popular sights in Ontario are Ontario Convention Center and Cucamonga-Guasti Regional Park. These are among the most viewed places in Ontario on KAYAK.

Your guide to booking Baltimore to Ontario 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 Wednesday departure and avoid flying on Thursday. On this route, Wednesday flights average $435, about $71 less than Thursday fares (14% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 13 weeks before you fly. On this route, that window historically saves about 34% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Baltimore to Ontario trip for February. Fares historically average $376 round-trip in that month - typically $180 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 Houston George Bush Intcntl Airport (IAH) can be cheaper than flying direct. The cheapest layover option averages $326 round-trip on this route - about $227 less than direct flights (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Ontario Airport.

    • Ontario Airport Inn
    • Azure Hotel & Suites, Trademark Collection by Wyndham
    • Holiday Inn Ontario Airport By IHG

More options for your flight from Baltimore to Ontario

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

Car rentals in Ontario
Hotels in Ontario
Vacations in Ontario