HLN - ONT

$235 Find Cheap Flights from Helena to Ontario - Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$369
Typical prices: $310-$556
Delta
Fri 1/12Mon 1/15
HLN - ONT • 1 stop
Cheapest one-way
$235
Typical prices: $199-$368
Alaska Airlines
Tue 11/20
HLN - ONT • 1 stop
Top layover airports
Seattle/Tacoma Intl (SEA)
Cheapest • Avg $274 (round-trip)
Salt Lake City (SLC)
Shortest trip • 4h 37m (one-way)
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Cheap Flights from Helena to Ontario (HLN-ONT)

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

Recent round-trip flight deals from Helena to Ontario

Tue, Jan 12 - Fri, Jan 15
Delta Logo
1:12 pm - 4:27 pmHLN  Helena-ONT Ontario
4h 15m1 stop Salt Lake City
Delta Logo
6:00 am - 12:32 pmONT  Ontario-HLN Helena
5h 32m1 stop Salt Lake City
$369Delta
Tue, Jan 12 - Sun, Jan 17
Delta Logo
1:12 pm - 10:35 pmHLN  Helena-ONT Ontario
10h 23m2 stops Salt Lake City Seattle/Tacoma Intl
Delta Logo
6:00 am - 12:32 pmONT  Ontario-HLN Helena
5h 32m1 stop Salt Lake City
$374Delta
Sat, Jan 16 - Tue, Jan 19
Delta Logo
7:10 am - 12:12 pmHLN  Helena-ONT Ontario
6h 02m1 stop Salt Lake City
Delta Logo
5:07 pm - 10:32 pmONT  Ontario-HLN Helena
4h 25m1 stop Salt Lake City
$394Delta
Tue, Jan 12 - Fri, Jan 15
Delta Logo
1:12 pm - 10:35 pmHLN  Helena-ONT Ontario
10h 23m2 stops Salt Lake City Seattle/Tacoma Intl
Delta Logo
6:00 am - 12:32 pmONT  Ontario-HLN Helena
5h 32m1 stop Salt Lake City
$399Delta
Mon, Jan 11 - Tue, Jan 19
Alaska Airlines Logo
5:00 pm - 10:41 pmHLN  Helena-ONT Ontario
6h 41m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
4:16 pm - 4:23 pmONT  Ontario-HLN Helena
23h 07m1 stop Seattle/Tacoma Intl
$406Alaska Airlines
Mon, Jan 11 - Wed, Jan 20
Alaska Airlines Logo
5:00 pm - 10:41 pmHLN  Helena-ONT Ontario
6h 41m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
7:10 am - 4:23 pmONT  Ontario-HLN Helena
8h 13m2 stops Portland Seattle/Tacoma Intl
$411Alaska Airlines
Wed, Dec 23 - Mon, Dec 28
Delta Logo
1:10 pm - 4:10 pmHLN  Helena-ONT Ontario
4h 00m1 stop Salt Lake City
Delta Logo
6:00 am - 12:30 pmONT  Ontario-HLN Helena
5h 30m1 stop Salt Lake City
$424Delta
Fri, Jan 22 - Sun, Jan 24
Alaska Airlines Logo
5:00 pm - 8:02 pmHLN  Helena-ONT Ontario
28h 02m2 stops Seattle/Tacoma Intl Portland
Alaska Airlines Logo
7:00 am - 4:23 pmONT  Ontario-HLN Helena
8h 23m1 stop Seattle/Tacoma Intl
$426Alaska Airlines
Sun, Jan 17 - Wed, Jan 20
Alaska Airlines Logo
5:00 pm - 10:41 pmHLN  Helena-ONT Ontario
6h 41m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
7:10 am - 4:23 pmONT  Ontario-HLN Helena
8h 13m2 stops Portland Seattle/Tacoma Intl
$441Alaska Airlines
Mon, Jan 11 - Thu, Jan 21
Alaska Airlines Logo
5:00 pm - 10:41 pmHLN  Helena-ONT Ontario
6h 41m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
7:10 am - 4:23 pmONT  Ontario-HLN Helena
8h 13m2 stops Portland Seattle/Tacoma Intl
$446Alaska Airlines
Booking Insights

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

Round-trip flights from Helena to Ontario typically range from $310 to $556. The lowest price found in the past 5 days was $369, on Delta.

Find deals

Key details for Helena to Ontario flights

Cheapest flight

$235
One-way flight from Helena to Ontario

When to book flights from Helena to Ontario

Are your dates flexible? Find out the best times to travel from Helena 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 Helena to Ontario flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • How long is a flight from Helena to Ontario?

    There are currently no nonstop flights available from Helena to Ontario. Flights with 1 layover take between 4h 37m and 8h 04m in total, depending on the connection.

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

    Round-trip flights from Helena to Ontario range from $310 to $556, with an average of $353 over the past 12 months. Anything below $310 counts as a good deal.

  • Have flight prices from Helena 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 $369 to $1,016. That means the highest observed fare was about 3x higher than the lowest one.

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

    One-way fares from Helena to Ontario are currently lower than usual. Average one-way flight prices are about $298, which is 6% 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 Helena to Ontario?

    Flights from Helena to Ontario usually depart from Helena (HLN) and arrive at Ontario (ONT).

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

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

    • Salt Lake City (SLC) - 79% of one-stop connections
    • Denver Intl (DEN) - 14% of one-stop connections
    • Seattle/Tacoma Intl (SEA) - 7% of one-stop connections

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

    Yes. Flexible dates can save you up to 62% on flights from Helena to Ontario. Wednesday is the cheapest departure day at $216 round-trip on average, while Saturday is the most expensive at $556, a difference of $340.

    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 Helena to Ontario?

    Flying via Salt Lake City (SLC) gives the shortest average 1-stop total travel time at 4h 37m, compared with 7h 29m via Denver Intl (DEN) and 8h 04m via Seattle/Tacoma Intl (SEA).

  • What is the time difference between Helena and Ontario?

    Ontario is 1 hour behind Helena (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 Helena to Ontario flights

Get tips on when to book, when to fly and what to know before your trip.

More options for your flight from Helena to Ontario

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

Car rentals in Ontario
Hotels in Ontario
Vacations in Ontario