BOS - ONT

$150 Find Cheap Flights from Boston to Ontario - Compare and Save

1 adult
1 adult, Economy, 0 bags

Save 25% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Everything you should know

Cheapest round-trip
$297
Typical prices: $373-$598
Delta
Mon 12/3Sun 12/9
BOS - ONT • 1 stop
Cheapest one-way
$150
Typical prices: $190-$344
Frontier
Fri 12/14
BOS - ONT • 2 stops
Nonstop flights
Not available
There are currently no direct flights between Boston and Ontario. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to book
10 weeks
in advance
Our data shows that travelers who book at least 10 weeks in advance save around 43% compared to booking last minute.
Insights
Insights
When to travel
February
Cheapest • 27% price drop
June
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Charlotte Douglas (CLT)
Cheapest • Avg $334 (round-trip)
Denver Intl (DEN)
Shortest trip • 7h 44m (one-way)
Insights
Insights
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Ontario!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Boston to Ontario (BOS-ONT)

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

Recent round-trip flight deals from Boston to Ontario

Thu, Dec 3 - Wed, Dec 9
Delta Logo
5:20 am - 11:07 amBOS  Boston Logan Intl-ONT Ontario
8h 47m1 stop Atlanta Hartsfield-Jackson
Delta Logo
12:20 pm - 1:10 amONT  Ontario-BOS Boston Logan Intl
9h 50m1 stop Atlanta Hartsfield-Jackson
$297Delta
Thu, Dec 3 - Wed, Dec 9
Frontier Logo
11:08 am - 12:17 amBOS  Boston Logan Intl-ONT Ontario
16h 09m2 stops Orlando Denver Intl
Frontier Logo
2:53 pm - 10:39 amONT  Ontario-BOS Boston Logan Intl
16h 46m2 stops Las Vegas Harry Reid Intl Atlanta Hartsfield-Jackson
$328Frontier
Thu, Dec 3 - Wed, Dec 9
Delta Logo
5:20 am - 11:07 amBOS  Boston Logan Intl-ONT Ontario
8h 47m1 stop Atlanta Hartsfield-Jackson
Delta Logo
12:20 pm - 1:10 amONT  Ontario-BOS Boston Logan Intl
9h 50m1 stop Atlanta Hartsfield-Jackson
$334Delta
Mon, Dec 7 - Mon, Dec 14
American Airlines Logo
6:26 am - 12:38 pmBOS  Boston Logan Intl-ONT Ontario
9h 12m1 stop Phoenix Sky Harbor Intl
American Airlines Logo
1:23 pm - 11:45 pmONT  Ontario-BOS Boston Logan Intl
7h 22m1 stop Phoenix Sky Harbor Intl
$335American Airlines
Mon, Nov 23 - Wed, Dec 2
American Airlines Logo
6:00 am - 1:19 pmBOS  Boston Logan Intl-ONT Ontario
10h 19m1 stop Dallas/Fort Worth
American Airlines Logo
9:35 am - 8:51 pmONT  Ontario-BOS Boston Logan Intl
8h 16m1 stop Phoenix Sky Harbor Intl
$335American Airlines
Sat, Dec 5 - Tue, Dec 8
Alaska Airlines Logo
4:56 pm - 11:54 pmBOS  Boston Logan Intl-ONT Ontario
9h 58m1 stop Portland
Alaska Airlines Logo
6:00 am - 11:59 pmONT  Ontario-BOS Boston Logan Intl
14h 59m1 stop Seattle/Tacoma Intl
$335Alaska Airlines
Fri, Dec 4 - Wed, Dec 9
United Airlines Logo
2:59 pm - 9:11 pmBOS  Boston Logan Intl-ONT Ontario
9h 12m1 stop Denver Intl
United Airlines Logo
6:40 pm - 7:57 amONT  Ontario-BOS Boston Logan Intl
10h 17m1 stop San Francisco
$350United Airlines
Fri, Dec 4 - Wed, Dec 9
United Airlines Logo
2:59 pm - 9:11 pmBOS  Boston Logan Intl-ONT Ontario
9h 12m1 stop Denver Intl
United Airlines Logo
5:00 am - 5:55 pmONT  Ontario-BOS Boston Logan Intl
9h 55m2 stops Denver Intl Chicago O'Hare Intl
$360United Airlines
Mon, Nov 23 - Wed, Dec 2
Southwest Logo
5:00 am - 2:05 pmBOS  Boston Logan Intl-ONT Ontario
12h 05m1 stop Denver Intl
Southwest Logo
8:40 am - 10:15 pmONT  Ontario-BOS Boston Logan Intl
10h 35m2 stops Phoenix Sky Harbor Intl Nashville Intl
$367Southwest
Thu, Dec 3 - Sun, Dec 6
Southwest Logo
5:00 am - 10:10 amBOS  Boston Logan Intl-ONT Ontario
8h 10m1 stop Denver Intl
Southwest Logo
8:05 am - 10:05 pmONT  Ontario-BOS Boston Logan Intl
11h 00m2 stops Denver Intl Chicago Midway
$376Southwest
Booking Insights

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

Round-trip flights from Boston to Ontario typically range from $373 to $598. The lowest price found in the past 5 days was $297, on Delta.

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

Based on deals KAYAK users found in the last 12 months, Wednesday is the cheapest day of the week to fly from Boston to Ontario. It’s 18% cheaper than the average day, while Thursday is the most expensive, with prices 11% higher.

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

•February is the cheapest month to fly from Boston to Ontario at $346 round-trip.
•December ($647) and August ($629) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 86% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from Boston to Ontario the cheapest?

Flights from Boston to Ontario are cheapest 10 weeks before departure. Booking in this window typically costs about 43% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Find deals

Key details for Boston to Ontario flights

Low season

February

Cheapest flight

$150
Beat the crowds with an average 33% drop in travelers.
The most popular month to fly with an average 37% increase in travelers.
One-way flight from Boston to Ontario

When to book flights from Boston to Ontario

Are your dates flexible? Find out the best times to travel from Boston 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 Boston 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 Boston to Ontario?

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

    • Economy Class
    • First Class

  • How long is a flight from Boston to Ontario?

    A nonstop flight from Boston to Ontario takes 00m, covering 2,559 miles.

  • Do I need a passport to fly from Boston 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 Boston to Ontario flight?

    Round-trip flights from Boston to Ontario range from $373 to $598, with an average of $474 over the past 12 months. Anything below $373 counts as a good deal.

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

    Last-minute fares on this route (booked within two weeks of departure) run 18% above the $474 route average. Book 10 weeks before departure for the lowest fares.

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

    One-way fares from Boston to Ontario are currently lower than usual. Average one-way flight prices are about $176, which is 34% 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 Boston to Ontario?

    Flights from Boston to Ontario usually depart from Boston Logan Intl (BOS) and arrive at Ontario (ONT).

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

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

    • Phoenix Sky Harbor Intl (PHX) - 34% of one-stop connections
    • Denver Intl (DEN) - 17% of one-stop connections
    • Salt Lake City (SLC) - 13% of one-stop connections
    • Dallas/Fort Worth (DFW) - 10% of one-stop connections

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

    Yes. Flexible dates can save you up to 27% on flights from Boston to Ontario. Wednesday is the cheapest departure day at $392 round-trip on average, while Thursday is the most expensive at $530, a difference of $138.

    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 Boston to Ontario?

    Flying via Denver Intl (DEN) gives the shortest average 1-stop total travel time at 7h 44m, compared with 8h via Phoenix Sky Harbor Intl (PHX) and 8h 02m via Chicago Midway (MDW).

  • What is the time difference between Boston and Ontario?

    Ontario is 3 hours behind Boston (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 Boston 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 $392, about $138 less than Thursday fares (26% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 10 weeks before you fly. On this route, that window historically saves about 43% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Boston to Ontario trip for February. Fares historically average $346 round-trip in that month - typically $301 less than the most expensive month, which is December (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
    • Holiday Inn Ontario Airport By IHG
    • Azure Hotel & Suites, Trademark Collection by Wyndham

More options for your flight from Boston to Ontario

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

Car rentals in Ontario
Hotels in Ontario
Vacations in Ontario