ONT - HLN

$149 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 4/14. 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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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$294
Alaska Airlines
Wed 4/15Sat 4/18
ONT - HLN • 1 stop
Cheapest one-way
$149
Delta
Tue 4/14
ONT - HLN • 1 stop
Top airlines
Alaska Airlines
Cheapest • from $294 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Ontario and Helena. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Seattle (SEA)
Cheapest • Avg $336 (round-trip)
Salt Lake City (SLC)
Shortest trip • 5h 01m (one-way)
Insights
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Insights
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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!
Flight Deals
Booking Insights
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

Wed, Apr 15 - Sat, Apr 18
Alaska Airlines Logo
6:00 am - 5:45 pm
ONT
-
HLN
10h 45m
1 stop
Alaska Airlines Logo
6:22 pm - 11:59 pm
HLN
-
ONT
6h 37m
1 stop
$294Alaska Airlines
Wed, Apr 15 - Sat, Apr 18
Alaska Airlines Logo
6:00 am - 5:45 pm
ONT
-
HLN
10h 45m
1 stop
Alaska Airlines Logo
6:22 pm - 11:59 pm
HLN
-
ONT
6h 37m
1 stop
$304Alaska Airlines
Wed, Apr 15 - Sat, Apr 18
Alaska Airlines Logo
6:00 am - 5:45 pm
ONT
-
HLN
10h 45m
1 stop
Alaska Airlines Logo
6:22 pm - 11:59 pm
HLN
-
ONT
6h 37m
1 stop
$313Alaska Airlines
Wed, Jun 3 - Sat, Jun 6
Delta Logo
6:00 am - 12:23 pm
ONT
-
HLN
5h 23m
1 stop
Delta Logo
1:03 pm - 4:17 pm
HLN
-
ONT
4h 14m
1 stop
$331Delta
Wed, Apr 15 - Sat, Apr 18
United Airlines Logo
5:10 am - 1:39 pm
ONT
-
HLN
7h 29m
1 stop
United Airlines Logo
6:15 am - 5:47 pm
HLN
-
ONT
12h 32m
2 stops
$352United Airlines
Wed, Apr 15 - Sat, Apr 18
Alaska Airlines Logo
6:00 am - 5:45 pm
ONT
-
HLN
10h 45m
1 stop
Alaska Airlines Logo
6:22 pm - 5:45 pm
HLN
-
ONT
48h 23m
2 stops
$372Alaska Airlines
Wed, Apr 15 - Sat, Apr 18
Alaska Airlines Logo
6:00 am - 5:45 pm
ONT
-
HLN
10h 45m
1 stop
Alaska Airlines Logo
6:22 pm - 5:45 pm
HLN
-
ONT
48h 23m
2 stops
$381Alaska Airlines
Sat, May 23 - Sat, May 30
United Airlines Logo
5:00 am - 1:33 pm
ONT
-
HLN
7h 33m
1 stop
United Airlines Logo
2:20 pm - 8:42 pm
HLN
-
ONT
7h 22m
1 stop
$401United Airlines
Sat, Jul 18 - Sun, Jul 26
Delta Logo
5:05 pm - 10:34 pm
ONT
-
HLN
4h 29m
1 stop
Delta Logo
5:45 am - 9:01 am
HLN
-
ONT
4h 16m
1 stop
$434Delta
Thu, May 7 - Mon, May 11
Alaska Airlines Logo
3:26 pm - 5:45 pm
ONT
-
HLN
25h 19m
1 stop
Alaska Airlines Logo
6:22 pm - 9:45 am
HLN
-
ONT
16h 23m
1 stop
$445Alaska Airlines
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 ($294) and Delta ($331).

Find deals

Good to know

Cheapest flight$149
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 $149 for a one-way ticket and $294 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?

    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 8288 reviews
8.1Boarding
7.8Entertainment
7.9Comfort
8.5Crew
7.2Food
Airline reviews

I was in first class and literally the men behind me were so aggressively loud I moved myself to economy. This has become so common on Delta - people using audio without headphones, and men on 12am / late night flights drinking and yelling to talk to each other which prevents anyone around them from resting. Pretty crazy to have to move from first to economy (poorer service, less comfort...). Wild wild. Looking into other airlines.

2.0 MediocreIsabella, Mar 2026
SJC - SLC
Read more Delta reviews

I was in first class and literally the men behind me were so aggressively loud I moved myself to economy. This has become so common on Delta - people using audio without headphones, and men on 12am / late night flights drinking and yelling to talk to each other which prevents anyone around them from resting. Pretty crazy to have to move from first to economy (poorer service, less comfort...). Wild wild. Looking into other airlines.

Flight was delayed by 3-hours and their fix was… complimentary pretzels.

The crew, and fellow passengers, were super gracious and kind. There seemed to be plenty of bin space even though the plane was full. It’s nice to get a glass of wine with dinner in Premiere seating, and there was a lot of food.

Everything I mentioned earlier - the airbus was more comfortable indeed and the experience was further enhanced.

The plane was an older model, so it wasn’t as comfortable as others. The flight attendants were not helpful during onboarding. It was a full flight so there was chaos finding space for baggage.

Awesome! On time flight, early arrival, and a complimentary upgrade!

Delta One is extraordinary. I fly business when somebody hires me. I just wonder why there is such a chasm between business class and the insanely inhumane and nonsensical coach. The seats are not large enough to fit even my tiny wife. We fly 10% of what we did because we don’t want to pay 5-10 k but for $400 it’s unbearable. It seems like the accountants took over and made stupid decisions. Screw in 20 extra seats and make it so unbearable that people fly 90% less. Just put the damn price up and put some proper chairs in. But business, yay.

Delta’s staff is unmatched. From the gate agents, to the pilots, to the flight attendants… all top of the industry.

The flight was delayed for about 2 hrs. Other than it, it was good.

I am extremely disappointed that delta internal pilot manuals now refer to the Gulf of Mexico as the “gulf of America”. You can bow down to the Orange turd on your own. I will never fly delta again

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

Information on your arrival and departure airports

Ontario (ONT)
Helena (HLN)