BIL - ONT

$161 Find Cheap Flights from Billings to Ontario - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$328
Typical prices: $339-$537
Alaska Airlines
Fri 9/21Sat 9/29
BIL - ONT • 1 stop
Cheapest one-way
$161
Typical prices: $204-$428
Delta
Mon 9/24
BIL - ONT • 1 stop
Nonstop flights
Not available
There are currently no direct flights between Billings and Ontario. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to travel
September
Cheapest • 19% price drop
November
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Las Vegas Harry Reid Intl (LAS)
Cheapest • Avg $311 (round-trip)
Salt Lake City (SLC)
Shortest trip • 4h 50m (one-way)
Insights
Insights
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Flight Deals

Cheap Flights from Billings to Ontario (BIL-ONT)

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

Recent round-trip flight deals from Billings to Ontario

Mon, Oct 19 - Tue, Oct 27
Alaska Airlines Logo
7:41 am - 1:16 pmBIL  Billings Logan Intl-ONT Ontario
6h 35m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
7:25 am - 3:04 pmONT  Ontario-BIL Billings Logan Intl
6h 39m1 stop Portland
$321Alaska Airlines
Mon, Sep 21 - Tue, Sep 29
Alaska Airlines Logo
7:29 pm - 11:16 amBIL  Billings Logan Intl-ONT Ontario
16h 47m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
6:02 am - 6:49 pmONT  Ontario-BIL Billings Logan Intl
11h 47m1 stop Seattle/Tacoma Intl
$328Alaska Airlines
Mon, Oct 19 - Tue, Oct 27
United Airlines Logo
4:00 pm - 8:58 pmBIL  Billings Logan Intl-ONT Ontario
5h 58m1 stop Denver Intl
United Airlines Logo
9:25 am - 10:30 pmONT  Ontario-BIL Billings Logan Intl
12h 05m2 stops San Francisco Denver Intl
$366United Airlines
Sat, Oct 17 - Wed, Oct 21
Delta Logo
6:29 pm - 10:11 pmBIL  Billings Logan Intl-ONT Ontario
4h 42m1 stop Salt Lake City
Delta Logo
6:00 am - 12:18 pmONT  Ontario-BIL Billings Logan Intl
5h 18m1 stop Salt Lake City
$371Delta
Sat, Feb 13 - Tue, Feb 16
Delta Logo
6:25 pm - 11:48 pmBIL  Billings Logan Intl-ONT Ontario
6h 23m1 stop Salt Lake City
Delta Logo
6:00 am - 12:19 pmONT  Ontario-BIL Billings Logan Intl
5h 19m1 stop Salt Lake City
$371Delta
Tue, Oct 27 - Fri, Oct 30
Alaska Airlines Logo
7:41 am - 1:16 pmBIL  Billings Logan Intl-ONT Ontario
6h 35m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
2:13 pm - 11:50 pmONT  Ontario-BIL Billings Logan Intl
8h 37m1 stop Seattle/Tacoma Intl
$371Alaska Airlines
Tue, Oct 27 - Fri, Oct 30
Alaska Airlines Logo
7:41 am - 1:16 pmBIL  Billings Logan Intl-ONT Ontario
6h 35m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
2:13 pm - 11:50 pmONT  Ontario-BIL Billings Logan Intl
8h 37m1 stop Seattle/Tacoma Intl
$371Alaska Airlines
Sat, Dec 5 - Wed, Dec 9
Alaska Airlines Logo
6:00 am - 11:09 amBIL  Billings Logan Intl-ONT Ontario
6h 09m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
6:00 am - 3:08 pmONT  Ontario-BIL Billings Logan Intl
8h 08m1 stop Seattle/Tacoma Intl
$377Alaska Airlines
Sat, Sep 12 - Wed, Sep 16
Delta Logo
6:33 pm - 10:04 pmBIL  Billings Logan Intl-ONT Ontario
4h 31m1 stop Salt Lake City
Delta Logo
5:15 pm - 10:34 pmONT  Ontario-BIL Billings Logan Intl
4h 19m1 stop Salt Lake City
$421Delta
Sun, Sep 13 - Thu, Sep 17
Delta Logo
5:20 am - 9:02 amBIL  Billings Logan Intl-ONT Ontario
4h 42m1 stop Salt Lake City
Delta Logo
9:52 am - 5:53 pmONT  Ontario-BIL Billings Logan Intl
7h 01m1 stop Salt Lake City
$495Delta
Booking Insights

Price, demand and travel trends for Billings to Ontario flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from Billings to Ontario with more confidence.

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

Round-trip flights from Billings to Ontario start at $328. Prices are below average for this route right now, with typical round-trip fares ranging from $339 to $537. The lowest price found in the past 5 days was $328 on Alaska Airlines.

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Key details for Billings to Ontario flights

Low season

April

Cheapest flight

$161
Best time to beat the crowds but there is an average 26% increase in price.
Most popular time to fly with an average 62% increase in price.
Flight from Billings to Ontario

When to book flights from Billings to Ontario

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

    Flights from Billings to Ontario usually depart from Billings Logan Intl (BIL) and arrive at Ontario (ONT).

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

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

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

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

    • Salt Lake City (SLC) - 71% of one-stop connections
    • Denver Intl (DEN) - 20% of one-stop connections
    • Las Vegas Harry Reid Intl (LAS) - 6% of one-stop connections
    • Portland (PDX) - 3% of one-stop connections

    Salt Lake City (SLC) handles the largest share of one-stop connections on this route.

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

    Yes. Being flexible with your travel dates can save you up to 51% on the Billings to Ontario route. Thursday is the cheapest departure day at $340 round-trip on average, while Saturday is the most expensive at $693, a difference of $353. 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 long is a flight from Billings to Ontario?

    A nonstop flight from Billings to Ontario takes 0h 00m, covering 941 miles.

  • Do I need a passport to fly from Billings 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.

  • Have flight prices from Billings to Ontario 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 $321 to $2,492. That means the highest observed fare was about 8x higher than the lowest one.

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

    One-way fares from Billings to Ontario are currently higher than usual. Average one-way flight prices are about $326, which is 16% above the typical average for this route.

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

    Flying via Salt Lake City (SLC) gives the shortest average 1-stop total travel time at 4h 50m, compared with 6h 06m via Portland (PDX) and 7h 01m via Denver Intl (DEN).

  • What is the time difference between Billings and Ontario?

    Ontario is 1 hour behind Billings (Pacific Time vs Mountain 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 Billings to Ontario flight?

    Round-trip flights from Billings to Ontario range from $339 to $537, with an average of $419 over the past 12 months. Anything below $339 counts as a good deal.

Your guide to booking Billings 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 Thursday departure instead of Saturday. On this route, Thursday flights average $340 - about $353 less than Saturday (51% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Billings to Ontario trip for September. Fares historically average $340 round-trip in that month - typically $353 less than the most expensive month, which is August (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

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

Information on your arrival and departure airports

Billings (BIL)
Ontario (ONT)