ONT - HLN

$200 Find Cheap Flights from Ontario to Helena

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Helena departing on 7/16. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Helena

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Helena, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Helena, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Ontario to Helena (ONT-HLN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Helena that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Helena

Sun, Aug 3 - Tue, Aug 12
Delta Logo
5:09 pm - 10:47 pmONT-HLN
4h 38m1 stop
Delta Logo
5:50 am - 8:55 amHLN-ONT
4h 05m1 stop
$304Delta
Find Deal
Fri, Sep 5 - Mon, Sep 8
Alaska Airlines Logo
7:22 pm - 3:21 pmONT-HLN
18h 59m1 stop
Alaska Airlines Logo
4:02 pm - 11:59 pmHLN-ONT
8h 57m1 stop
$307Alaska Airlines
Find Deal
Sun, Aug 3 - Tue, Aug 12
Delta Logo
5:09 pm - 10:47 pmONT-HLN
4h 38m1 stop
Delta Logo
1:00 pm - 10:42 pmHLN-ONT
10h 42m2 stops
$309Delta
Find Deal
Sun, Aug 3 - Tue, Aug 12
Delta Logo
5:09 pm - 10:47 pmONT-HLN
4h 38m1 stop
Delta Logo
5:50 am - 8:55 amHLN-ONT
4h 05m1 stop
$328Delta
Find Deal
Wed, Jul 23 - Sun, Jul 27
Delta Logo
6:00 am - 12:20 pmONT-HLN
5h 20m1 stop
Delta Logo
5:50 am - 8:47 amHLN-ONT
3h 57m1 stop
$329Delta
Find Deal
Sun, Aug 3 - Tue, Aug 12
Delta Logo
5:09 pm - 10:47 pmONT-HLN
4h 38m1 stop
Delta Logo
1:00 pm - 10:42 pmHLN-ONT
10h 42m2 stops
$333Delta
Find Deal
Fri, Sep 5 - Mon, Sep 8
Alaska Airlines Logo
7:22 pm - 3:21 pmONT-HLN
18h 59m1 stop
Alaska Airlines Logo
4:02 pm - 9:26 amHLN-ONT
18h 24m2 stops
$340Alaska Airlines
Find Deal
Thu, Aug 28 - Thu, Sep 4
United Airlines Logo
5:10 am - 4:04 pmONT-HLN
9h 54m1 stop
United Airlines Logo
2:30 pm - 8:43 pmHLN-ONT
7h 13m1 stop
$461United Airlines
Find Deal
Thu, Jul 10 - Mon, Jul 14
United Airlines Logo
1:34 pm - 9:15 pmONT-HLN
6h 41m1 stop
United Airlines Logo
5:39 pm - 5:25 pmHLN-ONT
24h 46m1 stop
$551United Airlines
Find Deal
Fri, Sep 5 - Mon, Sep 8
United Airlines Logo
6:00 am - 4:04 pmONT-HLN
9h 04m2 stops
United Airlines Logo
6:45 am - 5:37 pmHLN-ONT
11h 52m2 stops
$1,061United Airlines
Find Deal
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KAYAK's insights & trends for Ontario to Helena flights

Get data-powered insights and trends into flights from Ontario to Helena to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Ontario to Helena?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Ontario to Helena were found on Delta ($304) and Alaska Airlines ($307).

Find deals

Good to know

Cheapest flight$200
Flight from Ontario to Helena

When to book flights from Ontario to Helena

Are your dates flexible? Find out the best times to travel from Ontario to Helena based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ontario to Helena

  • What is the cheapest flight from Ontario to Helena?

    In the last 3 days, the lowest price for a flight from Ontario to Helena was $200 for a one-way ticket and $304 for a round-trip.

  • Do I need a passport to fly between Ontario and Helena?

    No

  • Which aircraft models fly most regularly from Ontario to Helena?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Ontario to Helena?

    Star Alliance, oneworld, and SkyTeam are the airline alliances operating flights between Ontario and Helena, with SkyTeam being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Ontario to Helena?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Helena.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Helena?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Helena from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to Helena?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Helena with an airline and back to Ontario with another airline. Booking your flights between Ontario and HLN can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Helena?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Helena from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Ontario to Helena

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Helena. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ontario to Helena? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
DeltaOverall score based on 7964 reviews
7.9Entertainment
7.9Comfort
8.5Crew
8.2Boarding
7.3Food
Airline reviews

Most aspects were good however if they assign boarding zones they ought to enforce them or why bother? My luggage from SAN-JFK-MAD was lost in NY so I without my main bag for two days upon arrival in Spain. They were helpful in tracking it and eventually delivered it to my hotel. The flub was because of a delay upon arrival in NYC. I had booked 2 1/2 hours between flights but we had to hold on the taxiway for an hour after landing while waiting for a clear gate which likely caused the baggage error.

8.0 ExcellentMathew, Jun 2025SAN - JFK
Read more Delta reviews

Most aspects were good however if they assign boarding zones they ought to enforce them or why bother? My luggage from SAN-JFK-MAD was lost in NY so I without my main bag for two days upon arrival in Spain. They were helpful in tracking it and eventually delivered it to my hotel. The flub was because of a delay upon arrival in NYC. I had booked 2 1/2 hours between flights but we had to hold on the taxiway for an hour after landing while waiting for a clear gate which likely caused the baggage error.

Excellent flight, the planes were newer, they did a nice job with boarding, great service overall.

It would be nice if was given wires ear buds. Overall was a good experience was able to sleep on the plane

737-800 in first class was pretty dumpy. Seat had an uncomfortable angle, storage under the seat was blocked so even my very modest backpack didn't fit, power outlet was flaky. Weird tiny seat pockets that couldn't hold a gallon ziploc bag, emesis bag missing, etc. etc. No in-flight service due to turbulence. Crew was excellent, boarding was smooth despite a full flight.

Delta flight was on time, seats were comfortable, and crew was nice.

Thank you for not flipping the plane on the run way. You guys get a 5 star rating for the flight!!!

Boarding is, as it always is… horrible. Gate lice. Slow moving zones. Too many people with carry ons

It was terrible, if they ran flights on time it would make a big difference.

Delta seems to be improving in many areas, except they are super bad with the food available. Bring back normal food service on long flights.

I actually received a notification from kayak on email but not one by text from Delta when my departure gait changed and I almost missed my flight

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

Information on your arrival and departure airports

Ontario (ONT)
Helena (HLN)

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