BIL - ONT

$256 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
$321
Typical prices: $339-$537
Multiple Airlines
Fri 11/16Fri 11/23
BIL - ONT • 1 stop
Cheapest one-way
$256
Typical prices: $160-$290
Delta
Wed 11/7
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 • 18% price drop
January
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 45m (one-way)
Insights
Insights
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We hope you love your trip to Ontario!

Cheap Flights from Billings to Ontario (BIL-ONT)

 

Cheap flights from Billings to Ontario with top airlines, updated regularly. Compare round-trip, one-way, direct and last-minute deals.

Mon, Nov 16 - Mon, Nov 23
Multiple Airlines Logo
12:14 pm - 9:40 amBIL  Billings Logan Intl-ONT Ontario
22h 26m1 stop Las Vegas Harry Reid Intl
Multiple Airlines Logo
10:55 am - 5:07 pmONT  Ontario-BIL Billings Logan Intl
5h 12m1 stop Las Vegas Harry Reid Intl
$321Multiple Airlines
Mon, Nov 16 - Mon, Nov 23
Multiple Airlines Logo
12:14 pm - 9:40 amBIL  Billings Logan Intl-ONT Ontario
22h 26m1 stop Las Vegas Harry Reid Intl
Multiple Airlines Logo
8:31 pm - 9:21 pmONT  Ontario-BIL Billings Logan Intl
47h 50m2 stops San Francisco Las Vegas Harry Reid Intl
$347Multiple Airlines
Mon, Nov 9 - Tue, Nov 17
Alaska Airlines Logo
5:12 pm - 11:06 pmBIL  Billings Logan Intl-ONT Ontario
6h 54m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
4:09 pm - 10:43 pmONT  Ontario-BIL Billings Logan Intl
5h 34m1 stop Seattle/Tacoma Intl
$361Alaska Airlines
Thu, Dec 17 - Wed, Jan 6
Alaska Airlines Logo
11:56 am - 8:03 pmBIL  Billings Logan Intl-ONT Ontario
9h 07m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
7:10 am - 1:54 pmONT  Ontario-BIL Billings Logan Intl
5h 44m1 stop Portland
$361Alaska Airlines
Thu, Dec 17 - Wed, Jan 6
United Airlines Logo
2:35 pm - 9:00 pmBIL  Billings Logan Intl-ONT Ontario
7h 25m1 stop Denver Intl
United Airlines Logo
9:45 am - 9:15 pmONT  Ontario-BIL Billings Logan Intl
10h 30m2 stops San Francisco Denver Intl
$366United Airlines
Wed, Nov 11 - Tue, Nov 17
United Airlines Logo
5:00 am - 12:29 pmBIL  Billings Logan Intl-ONT Ontario
8h 29m2 stops Denver Intl San Francisco
United Airlines Logo
5:00 am - 1:29 pmONT  Ontario-BIL Billings Logan Intl
7h 29m1 stop Denver Intl
$366United Airlines
Wed, Nov 11 - Tue, Nov 17
United Airlines Logo
5:00 am - 12:29 pmBIL  Billings Logan Intl-ONT Ontario
8h 29m2 stops Denver Intl San Francisco
United Airlines Logo
9:25 am - 10:30 pmONT  Ontario-BIL Billings Logan Intl
12h 05m2 stops San Francisco Denver Intl
$372United Airlines
Fri, Nov 20 - Mon, Nov 23
Multiple Airlines Logo
5:57 pm - 7:20 amBIL  Billings Logan Intl-ONT Ontario
14h 23m1 stop Las Vegas Harry Reid Intl
Multiple Airlines Logo
8:15 am - 5:07 pmONT  Ontario-BIL Billings Logan Intl
7h 52m1 stop Las Vegas Harry Reid Intl
$393Multiple Airlines
Sat, Nov 7 - Tue, Nov 10
Delta Logo
6:29 pm - 10:11 pmBIL  Billings Logan Intl-ONT Ontario
4h 42m1 stop Salt Lake City
Delta Logo
5:04 pm - 10:20 pmONT  Ontario-BIL Billings Logan Intl
4h 16m1 stop Salt Lake City
$411Delta
Mon, Nov 30 - Sun, Dec 6
Delta Logo
6:29 pm - 11:49 pmBIL  Billings Logan Intl-ONT Ontario
6h 20m1 stop Salt Lake City
Delta Logo
5:04 pm - 10:28 pmONT  Ontario-BIL Billings Logan Intl
4h 24m1 stop Salt Lake City
$411Delta

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 with more confidence.

Which airline is the cheapest to fly from Billings to Ontario?

Alaska Airlines ($361) and United Airlines ($366) are the cheapest airlines to fly round-trip from Billings to Ontario according to KAYAK data over the last 5 days.

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Key details for Billings to Ontario flights

Low season

April

Cheapest flight

$256
Beat the crowds with an average 71% drop in travelers.
The most popular month to fly with an average 35% increase in travelers.
One-way 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 answers about this route, including flight times, airports, airlines and booking tips.

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

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

  • How long is a flight from Billings to Ontario?

    A nonstop flight from Billings to Ontario takes 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.

  • 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 $415 over the past 12 months. Anything below $339 counts as a good deal.

  • 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 $1,565. That means the highest observed fare was about 5x 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 $403, which is 58% above 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 starting from around $18 for economy cars. Top options include:

    • Fox
    • Thrifty
    • Europcar
    • Dollar
    • Alamo

  • 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).

  • 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) - 66% of one-stop connections
    • Denver Intl (DEN) - 24% of one-stop connections
    • Las Vegas Harry Reid Intl (LAS) - 7% of one-stop connections
    • Portland (PDX) - 3% of one-stop connections

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

    Yes. Flexible dates can save you up to 51% on flights from Billings to Ontario. 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.

  • 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 45m, compared with 6h 06m via Portland (PDX) and 6h 59m 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 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 Billings 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 Thursday departure and avoid flying on Saturday. On this route, Thursday flights average $340, about $353 less than Saturday fares (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.

    • Ontario Airport Inn
    • Azure Hotel & Suites, Trademark Collection by Wyndham
    • La Quinta Inn & Suites by Wyndham Ontario Airport

More options for your flight from Billings to Ontario

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

Car rentals in Ontario
Hotels in Ontario
Vacations in Ontario