App
Customer Support
EUR
Find Bookings
Worldwide Coverage
Worldwide Coverage
Flights to over 5,000 cities
One-stop Service Guarantee
One-stop Service Guarantee
Price guaranteed upon confirmed payment, booking guaranteed once tickets issued
Secure Payment
Secure Payment
Convenient & reliable booking and payment system

Cheap flight deals from Ontario to Boston Starting at €62

We've found these cheap flights for you. You can book one-way or round-trip flight tickets.

  • One way
  • Round-trip
      • ONT06:59 pm
        26h 26m
        1 stop
        BOS12:25 am
        Tue, Mar 25|Ontario - Boston|Frontier Airlines
        €62€146
        57% OFF
        57% OFF
        €146€62

        Choose Frontier Airlines flights from Ontario to Boston. The one-way connecting flight with Frontier Airlines departs from Ontario International Airport on Tue, Mar 25, arriving at General Edward Lawrence Logan International Airport. One-way Prices start from €62 including taxes and charges.

      • ONT06:59 pm
        26h 26m
        1 stop
        BOS12:25 am
        Tue, Mar 18|Ontario - Boston|Frontier Airlines
        €84€146
        42% OFF
        42% OFF
        €146€84

        Choose Frontier Airlines flights from Ontario to Boston. The one-way connecting flight with Frontier Airlines departs from Ontario International Airport on Tue, Mar 18, arriving at General Edward Lawrence Logan International Airport. One-way Prices start from €84 including taxes and charges.

      • ONT06:47 pm
        14h 20m
        1 stop
        BOS12:07 pm
        Wed, May 7|Ontario - Boston|Frontier Airlines
        €93€146
        36% OFF
        36% OFF
        €146€93

        Choose Frontier Airlines flights from Ontario to Boston. The one-way connecting flight with Frontier Airlines departs from Ontario International Airport on Wed, May 7, arriving at General Edward Lawrence Logan International Airport. One-way Prices start from €93 including taxes and charges.

      • ONT06:13 pm
        14h 42m
        1 stop
        BOS11:55 am
        Thu, Apr 3|Ontario - Boston|Frontier Airlines
        €96
        €96

        Choose Frontier Airlines flights from Ontario to Boston. The one-way connecting flight with Frontier Airlines departs from Ontario International Airport on Thu, Apr 3, arriving at General Edward Lawrence Logan International Airport. One-way Prices start from €96 including taxes and charges.

      • ONT12:27 pm
        20h 28m
        1 stop
        BOS11:55 am
        Tue, Apr 1|Ontario - Boston|Frontier Airlines
        €97
        €97

        Choose Frontier Airlines flights from Ontario to Boston. The one-way connecting flight with Frontier Airlines departs from Ontario International Airport on Tue, Apr 1, arriving at General Edward Lawrence Logan International Airport. One-way Prices start from €97 including taxes and charges.

      • ONT12:59 am
        25h 42m
        1 stop
        BOS05:41 am
        Mon, Mar 3|Ontario - Boston|Frontier Airlines
        €106
        €106

        Choose Frontier Airlines flights from Ontario to Boston. The one-way connecting flight with Frontier Airlines departs from Ontario International Airport on Mon, Mar 3, arriving at General Edward Lawrence Logan International Airport. One-way Prices start from €106 including taxes and charges.

      • ONT12:59 am
        24h 31m
        1 stop
        BOS04:30 am
        Tue, May 13|Ontario - Boston|Frontier Airlines
        €107
        €107

        Choose Frontier Airlines flights from Ontario to Boston. The one-way connecting flight with Frontier Airlines departs from Ontario International Airport on Tue, May 13, arriving at General Edward Lawrence Logan International Airport. One-way Prices start from €107 including taxes and charges.

      • ONT12:59 am
        25h 42m
        1 stop
        BOS05:41 am
        Wed, Feb 19|Ontario - Boston|Frontier Airlines
        €107
        €107

        Choose Frontier Airlines flights from Ontario to Boston. The one-way connecting flight with Frontier Airlines departs from Ontario International Airport on Wed, Feb 19, arriving at General Edward Lawrence Logan International Airport. One-way Prices start from €107 including taxes and charges.

      • ONT05:39 pm
        27h 46m
        1 stop
        BOS12:25 am
        Sun, Mar 9|Ontario - Boston|Frontier Airlines
        €107
        €107

        Choose Frontier Airlines flights from Ontario to Boston. The one-way connecting flight with Frontier Airlines departs from Ontario International Airport on Sun, Mar 9, arriving at General Edward Lawrence Logan International Airport. One-way Prices start from €107 including taxes and charges.

      • ONT12:59 am
        24h 25m
        1 stop
        BOS04:24 am
        Tue, Apr 15|Ontario - Boston|Frontier Airlines
        €110
        €110

        Choose Frontier Airlines flights from Ontario to Boston. The one-way connecting flight with Frontier Airlines departs from Ontario International Airport on Tue, Apr 15, arriving at General Edward Lawrence Logan International Airport. One-way Prices start from €110 including taxes and charges.

      • ONT01:00 pm
        3h 5m
        Nonstop
        BOS02:00 pm
        Wed, Feb 26|Ontario - Boston|Frontier Airlines
        Find More Flights
        Find More Flights

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Los Angeles to Boston Flight Time

Flight info.
Departure
Arrival
Weekly Schedule

  1. DL1345

    Delta Air Lines

    01:30 pm

    ONT

    1.8h

    04:16 pm

    SLC

    SMTWTFS
    Search

  2. DL702

    Delta Air Lines

    05:45 pm

    SLC

    4.6h

    12:19 am

    BOS

    SMTWTFS

  3. F91358

    Frontier Airlines

    03:42 pm

    ONT

    1.2h

    04:53 pm

    LAS

    S-TWTFS
    Search

  4. F91602

    Frontier Airlines

    11:00 pm

    LAS

    4.9h

    06:52 am

    PHL

    SMTWTFS

  5. F92168

    Frontier Airlines

    06:40 am

    PHL

    1.4h

    08:07 am

    BOS

    SM-WT-S

  6. F92908

    Frontier Airlines

    04:19 pm

    ONT

    2.4h

    07:41 pm

    DEN

    S--WT-S
    Search

  7. F91734

    Frontier Airlines

    12:13 am

    DEN

    3.8h

    05:59 am

    MCO

    SMTWTFS

  8. F91978

    Frontier Airlines

    08:29 am

    MCO

    3.3h

    11:45 am

    BOS

    S--WT-S

  9. DL3933

    Delta Air Lines

    05:10 pm

    ONT

    1.9h

    08:03 pm

    SLC

    SMTWTFS
    Search

  10. DL696

    Delta Air Lines

    11:24 pm

    SLC

    4.8h

    06:12 am

    BOS

    SMTWTFS

  11. AS1399

    Alaska Airlines

    07:20 pm

    ONT

    2.7h

    10:00 pm

    SEA

    SMTWTFS
    Search

  12. AS536

    Alaska Airlines

    11:00 pm

    SEA

    5.3h

    07:20 am

    BOS

    SMTWTFS

  13. F94206

    Frontier Airlines

    09:35 pm

    ONT

    1.2h

    10:48 pm

    LAS

    S--WTF-
    Search

  14. F91116

    Frontier Airlines

    11:03 pm

    LAS

    4.2h

    06:13 am

    ATL

    SMTWTFS

  15. F93512

    Frontier Airlines

    10:05 pm

    ATL

    2.6h

    12:44 am

    BOS

    SM-WT-S

  16. F92232

    Frontier Airlines

    10:52 am

    ONT

    1.2h

    12:04 pm

    LAS

    S--WTF-
    Search

  17. F91602

    Frontier Airlines

    11:00 pm

    LAS

    4.9h

    06:52 am

    PHL

    SMTWTFS

  18. F92168

    Frontier Airlines

    06:40 am

    PHL

    1.4h

    08:07 am

    BOS

    SM-WT-S

  19. F91262

    Frontier Airlines

    12:16 pm

    ONT

    2.3h

    03:35 pm

    DEN

    -M--T--
    Search

  20. F91280

    Frontier Airlines

    11:04 pm

    DEN

    3.9h

    05:00 am

    MIA

    SMTWTFS

  21. F91436

    Frontier Airlines

    07:05 am

    MIA

    3.5h

    10:33 am

    BOS

    -M-W-FS

  22. F91262

    Frontier Airlines

    12:16 pm

    ONT

    2.3h

    03:35 pm

    DEN

    -M--T--
    Search

  23. F93340

    Frontier Airlines

    11:45 pm

    DEN

    3.4h

    05:09 am

    PHL

    SM--TF-

  24. F92168

    Frontier Airlines

    06:40 am

    PHL

    1.4h

    08:07 am

    BOS

    SM-WT-S

  25. F91500

    Frontier Airlines

    12:59 am

    ONT

    2.3h

    04:16 am

    DEN

    SMTWTFS
    Search

  26. F9686

    Frontier Airlines

    06:40 am

    DEN

    3.5h

    12:07 pm

    DCA

    SMTWTFS

  27. B62354

    Jetblue Airways

    08:00 pm

    DCA

    1.6h

    09:34 pm

    BOS

    S--WTFS
Find more flights and airlines

When is the cheapest time to fly from Ontario to Boston?

We monitor flight fares to help you find the best deals effortlessly

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Frequently Asked Questions

  • When are flight tickets from Ontario (ONT) to Boston (BOS) the cheapest?

    Airlines adjust prices for flights from Ontario to Boston based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much do flights from Ontario (ONT) to Boston (BOS) cost?

    According to Trip.com's data, the lowest price is around €287.

How to find a cheap flight from Ontario to Boston

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Ontario to Boston. Book your flights at the right time and save more.
1
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com

Flight Info | Ontario to Boston

Cheapest nonstop flight price€61
Cheapest round-trip ticket price€205
Off-season for travelFebruary
Peak season for travelSeptember
Flight distance8,459.85 km
Popular airlineUnited Airlines

Contact Us

About

Other Services

Payment Methods
Our Partners
Copyright © 2025 Trip.com Travel Singapore Pte. Ltd. All rights reserved
Site Operator: Trip.com Travel Singapore Pte. Ltd.