BOS - ONT

$121 Find Cheap Flights from Boston to Ontario - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$251
Typical prices: $358-$585
Alaska Airlines
Sat 11/10Wed 11/14
BOS - ONT • 1 stop
Cheapest one-way
$121
Typical prices: $187-$329
Alaska Airlines
Sat 2/24
BOS - ONT • 1 stop
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
20 weeks
in advance
Our data shows that travelers who book at least 20 weeks in advance save around 41% compared to booking last minute.
Insights
Insights
When to travel
February
Cheapest • 30% price drop
June
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Charlotte Douglas (CLT)
Cheapest • Avg $327 (round-trip)
Denver Intl (DEN)
Shortest trip • 7h 50m (one-way)
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Insights
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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

Tue, Nov 10 - Sat, Nov 14
Alaska Airlines Logo
7:13 am - 3:13 pmBOS  Boston Logan Intl-ONT Ontario
11h 00m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
4:09 pm - 5:40 amONT  Ontario-BOS Boston Logan Intl
10h 31m1 stop Seattle/Tacoma Intl
$251Alaska Airlines
Sat, Oct 24 - Sat, Oct 31
Southwest Logo
5:15 am - 10:20 amBOS  Boston Logan Intl-ONT Ontario
8h 05m1 stop Denver Intl
Southwest Logo
6:30 am - 7:25 pmONT  Ontario-BOS Boston Logan Intl
9h 55m1 stop Chicago Midway
$252Southwest
Sat, Oct 24 - Sat, Oct 31
Southwest Logo
5:15 am - 10:20 amBOS  Boston Logan Intl-ONT Ontario
8h 05m1 stop Denver Intl
Southwest Logo
7:40 am - 7:25 pmONT  Ontario-BOS Boston Logan Intl
8h 45m2 stops Phoenix Sky Harbor Intl Chicago Midway
$258Southwest
Tue, Oct 27 - Fri, Oct 30
Alaska Airlines Logo
7:03 am - 6:00 pmBOS  Boston Logan Intl-ONT Ontario
13h 57m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
11:13 am - 11:59 pmONT  Ontario-BOS Boston Logan Intl
9h 46m1 stop Seattle/Tacoma Intl
$285Alaska Airlines
Wed, Nov 18 - Thu, Nov 26
Delta Logo
6:45 pm - 11:49 pmBOS  Boston Logan Intl-ONT Ontario
8h 04m1 stop Salt Lake City
Delta Logo
6:00 am - 4:26 pmONT  Ontario-BOS Boston Logan Intl
7h 26m1 stop Salt Lake City
$297Delta
Mon, Nov 23 - Wed, Dec 2
Delta Logo
7:50 am - 5:19 pmBOS  Boston Logan Intl-ONT Ontario
12h 29m1 stop Seattle/Tacoma Intl
Delta Logo
5:04 pm - 6:20 amONT  Ontario-BOS Boston Logan Intl
10h 16m1 stop Salt Lake City
$297Delta
Tue, Dec 22 - Tue, Jan 5
American Airlines Logo
3:57 pm - 10:51 pmBOS  Boston Logan Intl-ONT Ontario
9h 54m1 stop Dallas/Fort Worth
American Airlines Logo
7:36 pm - 5:25 amONT  Ontario-BOS Boston Logan Intl
6h 49m1 stop Phoenix Sky Harbor Intl
$327American Airlines
Wed, Oct 14 - Mon, Oct 19
American Airlines Logo
6:28 am - 1:30 pmBOS  Boston Logan Intl-ONT Ontario
10h 02m1 stop Dallas/Fort Worth
American Airlines Logo
1:05 pm - 11:45 pmONT  Ontario-BOS Boston Logan Intl
7h 40m1 stop Phoenix Sky Harbor Intl
$359American Airlines
Sat, Oct 31 - Tue, Nov 3
United Airlines Logo
9:00 am - 6:01 pmBOS  Boston Logan Intl-ONT Ontario
12h 01m1 stop San Francisco
United Airlines Logo
7:00 am - 7:14 pmONT  Ontario-BOS Boston Logan Intl
9h 14m1 stop Chicago O'Hare Intl
$361United Airlines
Sat, Nov 7 - Sat, Nov 14
United Airlines Logo
3:28 pm - 9:40 pmBOS  Boston Logan Intl-ONT Ontario
9h 12m1 stop Houston George Bush Intcntl
United Airlines Logo
9:25 am - 11:59 pmONT  Ontario-BOS Boston Logan Intl
11h 34m2 stops San Francisco Washington, D.C. Dulles Intl
$366United Airlines
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 from Boston to Ontario with more confidence.

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

Round-trip flights from Boston to Ontario start at $251. Prices are below average for this route right now, with typical round-trip fares ranging from $358 to $585. The lowest price found in the past 5 days was $251 on Alaska Airlines.

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

Friday is the cheapest day of the week to fly from Boston to Ontario, it is 18% cheaper than the average day. Sunday is the most expensive day with flight prices 15% higher than average. Based on deals found by KAYAK users in the last 12 months.

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

  • February is the cheapest month to fly from Boston to Ontario at $317 round-trip.
  • December ($647) and May ($546) are the most expensive months.
  • The price difference between flying in the cheapest and most expensive months is 104% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are prices from Boston to Ontario the cheapest?

Flights from Boston to Ontario are cheapest 20 weeks before departure. Booking in this window typically costs about 41% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

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Key details for Boston to Ontario flights

Low season

February

Cheapest flight

$121
Best time to beat the crowds with an average 30% drop in price.
Most popular time to fly with an average 6% increase in price.
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 route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • 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).

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

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

    • Economy Class
    • Premium Economy Class
    • First Class

  • 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) - 33% of one-stop connections
    • Denver Intl (DEN) - 14% of one-stop connections
    • Salt Lake City (SLC) - 14% of one-stop connections
    • New York John F Kennedy Intl (JFK) - 11% of one-stop connections

    Phoenix Sky Harbor Intl (PHX) handles the largest share of one-stop connections on this route.

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

    Yes. Being flexible with your travel dates can save you up to 29% on the Boston to Ontario route. Friday is the cheapest departure day at $374 round-trip on average, while Sunday is the most expensive at $523, a difference of $149. 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 Ontario?

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

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

    Last-minute fares on this route - booked within 2 weeks of departure - run 11% above the route average of $452. Book 20 weeks before departure for the lowest fares.

  • How long is a flight from Boston to Ontario?

    A nonstop flight from Boston to Ontario takes 0h 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 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 $166, which is 36% below the typical average for this route.

  • 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 50m, compared with 8h 02m via Phoenix Sky Harbor Intl (PHX) and 8h 06m 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 car rental options are available at Ontario Airport (ONT)?

    Ontario Airport (ONT) hosts 5 major car rental companies, with daily rates starting from around $18 for economy cars. Top options include:
    • Fox
    • Thrifty
    • Europcar
    • Dollar
    • Alamo

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

    Round-trip flights from Boston to Ontario range from $358 to $585, with an average of $452 over the past 12 months. Anything below $358 counts as a good deal.

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 can be flexible, aim for a Friday departure instead of Sunday. On this route, Friday flights average $374 - about $149 less than Sunday (28% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 20 weeks before you fly. On this route, that window historically saves about 41% 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 $317 round-trip in that month - typically $330 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.
    - Azure Hotel & Suites, Trademark Collection by Wyndham
    - La Quinta Inn & Suites by Wyndham Ontario Airport
    - Holiday Inn Ontario Airport By IHG

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