ONT - HLN

$348 Find Cheap Flights from Ontario to Helena

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Helena departing on 1/29. 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, 0 bags

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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Flight 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

Thu, Jan 29 - Sun, Feb 1
Alaska Airlines Logo
6:00 am - 5:22 pmONT-HLN
10h 22m1 stop
Alaska Airlines Logo
5:59 pm - 11:56 pmHLN-ONT
6h 57m1 stop
$348Alaska Airlines
Find Deal
Wed, Apr 29 - Sat, May 2
Delta Logo
6:00 am - 12:23 pmONT-HLN
5h 23m1 stop
Delta Logo
12:50 pm - 4:14 pmHLN-ONT
4h 24m1 stop
$349Delta
Find Deal
Wed, Apr 29 - Sat, May 2
Delta Logo
5:05 pm - 10:34 pmONT-HLN
4h 29m1 stop
Delta Logo
12:50 pm - 10:40 pmHLN-ONT
10h 50m2 stops
$354Delta
Find Deal
Wed, Apr 29 - Sat, May 2
Delta Logo
11:55 am - 10:34 pmONT-HLN
9h 39m2 stops
Delta Logo
12:50 pm - 10:40 pmHLN-ONT
10h 50m2 stops
$359Delta
Find Deal
Thu, Jan 29 - Sun, Feb 1
Alaska Airlines Logo
11:53 am - 5:22 pmONT-HLN
28h 29m1 stop
Alaska Airlines Logo
5:59 pm - 7:16 pmHLN-ONT
26h 17m2 stops
$391Alaska Airlines
Find Deal
Fri, Feb 13 - Mon, Feb 16
Alaska Airlines Logo
6:55 pm - 3:43 pmONT-HLN
19h 48m1 stop
Alaska Airlines Logo
4:10 pm - 6:17 pmHLN-ONT
27h 07m1 stop
$403Alaska Airlines
Find Deal
Thu, Jan 1 - Fri, Jan 16
United Airlines Logo
5:05 am - 1:45 pmONT-HLN
7h 40m1 stop
United Airlines Logo
2:27 pm - 8:58 pmHLN-ONT
7h 31m1 stop
$419United Airlines
Find Deal
Thu, Jan 29 - Sun, Feb 1
Alaska Airlines Logo
5:59 pm - 5:22 pmONT-HLN
22h 23m2 stops
Alaska Airlines Logo
5:59 pm - 8:15 pmHLN-ONT
27h 16m2 stops
$433Alaska Airlines
Find Deal
Thu, Jan 1 - Fri, Jan 16
Alaska Airlines Logo
6:00 am - 5:55 pmONT-HLN
10h 55m1 stop
Alaska Airlines Logo
5:59 pm - 7:16 pmHLN-ONT
26h 17m2 stops
$466Alaska Airlines
Find Deal

Everything you should know

Top airlines
Alaska Airlines
Cheapest • from $348 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Cheapest round-trip
$348
Alaska Airlines
Thu 1/29Sun 2/1
ONT - HLN • 1 stop
Cheapest one-way
Multiple Airlines
Mon 11/3
ONT - HLN • multi-stop
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Helena!
Booking Insights

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 Alaska Airlines ($348) and Delta ($349).

Which airlines fly non-stop between Ontario and Helena?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from Ontario to Helena.

There is just one airline that flies from Ontario to Helena direct and that is Delta. The best round-trip deal found from Delta for the route is $205.

Good to know

Cheapest flight$348
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 $348 for a round-trip ticket.

  • 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?

    SkyTeam is the only airline alliance operating flights between Ontario and Helena.

  • 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.
7.9
DeltaOverall score based on 8001 reviews
8.2Boarding
8.5Crew
7.9Entertainment
7.3Food
7.9Comfort
Airline reviews

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

8.0 ExcellentJulie, Oct 2025LAX - SFO
Read more Delta reviews

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

Delayed flight (1hour) plus a long layover after an overnight flight with no backup plane available.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

My husband upgraded our seats and I don't know if it was due to the type of planet was or if they didn't upgrade our seats. We were supposed to be in I believe comfort seats and they were just as tight as any other seat- no leg room and we are very tall people but at least it wasn't extremely cold. My husband did put in a complaint about our seating because he paid extra and if we would have known that the space and the tightness would have been the same, we just would have gotten the emergency row emergency row seats that we normally get. We love Delta but both our flights coming home we're not good. Oh I forgot to mention that on our flight to Hawaii our luggage wheels got broke and we had to purse new luggage on vacation then we never had this problem so we didn't know protocol and reported it after we got home only for them to tell is we only had 24hrs to report the damage. Not sure what was going on with Delta this vacation trip.

Crew was excellent. Comfort seats not as nice as other kinds of planes.

It was a great flight and the stewards and stewardess were all kind and accommodating!! The seats were comfortable and entertainment screen excellent!

There are 4 flights in consecutive gates with about the same departure time. Two flights were boarding at the same time. One was delayed or boarding would be happening at the same time. I am not sure what Delta and LAX need to do to have a better layout at the end of Terminal 2

There was a security issue at the airport and we were unable to land. We circled endlessly and then landed at another airfield for fuel. We then circled the airport again, almost landed but didn’t fully touch down before circling again. I am thankful to the crew for keeping us safe- the issue was the airline and staff at the airport getting us seats on our connecting flights. That part was hours of searching for someone and getting in double my steps.

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.

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

Information on your arrival and departure airports

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