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Helena

$165+ Cheap flights from Ontario to Helena (ONT - HLN)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — HLN
Aug 24 — Aug 311
Sun 8/24
Sun 8/31
1 adult, Economy
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Cheap flight deals from Ontario to Helena

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Helena (HLN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 19, 2025.

Round-trip from

$352
(Alaska Airlines)

One-way from

$165
(Delta)

Popular in

February

Cheapest in

August

Average price

$321
From Ontario to Helena
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One-way flight from Ontario to Helena
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Highest demand for flights based on searches. 25% potential increase in price ($154 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($37 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Ontario to Helena

Cheapest flights from Ontario to Helena
Explore the most affordable flight options available from Ontario to Helena. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 19, 2025.

This Alaska Airlines deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/267:40 pmONT - HLN
1 stop18h 41mAlaska Airlines
Tue 9/304:02 pmHLN - ONT
1 stop27h 45mAlaska Airlines
Deal found 8/17$352
This Delta deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/96:00 amONT - HLN
1 stop5h 20mDelta
Sun 10/125:45 amHLN - ONT
1 stop4h 20mDelta
Deal found 8/17$368
This United Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/101:15 pmONT - HLN
1 stop6h 56mUnited Airlines
Sun 9/146:30 amHLN - ONT
1 stop15h 13mUnited Airlines
Deal found 8/18$480
This United Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/35:10 amONT - HLN
1 stop7h 20mUnited Airlines
Mon 9/85:20 pmHLN - ONT
1 stop28h 23mUnited Airlines
Deal found 8/18$546
This Delta deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/296:05 amONT - HLN
1 stop5h 15mDelta
Mon 9/15:50 amHLN - ONT
1 stop4h 05mDelta
Deal found 8/18$562
This Alaska Airlines deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/36:00 amONT - HLN
1 stop8h 21mAlaska Airlines
Mon 9/84:02 pmHLN - ONT
1 stop9h 01mAlaska Airlines
Deal found 8/19$564
This United Airlines deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/305:10 amONT - HLN
1 stop7h 20mUnited Airlines
Sat 9/65:20 pmHLN - ONT
1 stop20h 12mUnited Airlines
Deal found 8/17$601
This Delta deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/34:50 pmONT - HLN
1 stop4h 23mDelta
Sun 9/75:50 amHLN - ONT
1 stop4h 05mDelta
Deal found 8/17$708

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Helena that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 19, 2025.
Use the filters below to find and compare flights from Ontario to Helena that are best for you.

Fly from

Ontario

Fly to

Helena

Route

Depart

Return

Price

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Mon 10/6

7:47 pm-5:41 pm

1 stop20h 54m

Helena

Sat 10/11

6:18 pm-12:03 am

1 stop6h 45m

$352

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Fri 9/26

7:40 pm-3:21 pm

1 stop18h 41m

Helena

Tue 9/30

4:02 pm-6:47 pm

1 stop27h 45m

$352

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Thu 10/9

6:00 am-12:20 pm

1 stop5h 20m

Helena

Sun 10/12

5:45 am-9:05 am

1 stop4h 20m

$368

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Thu 1/29

1:00 pm-8:59 pm

1 stop6h 59m

Helena

Sat 2/14

2:30 pm-8:17 pm

1 stop6h 47m

$399

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Wed 9/10

1:15 pm-9:11 pm

1 stop6h 56m

Helena

Sun 9/14

6:30 am-8:43 pm

1 stop15h 13m

$480

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Wed 9/3

5:10 am-1:30 pm

1 stop7h 20m

Helena

Mon 9/8

5:20 pm-12:32 pm

1 stop20h 12m

$546

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Thu 9/4

1:15 pm-9:11 pm

1 stop6h 56m

Helena

Mon 9/8

5:20 pm-8:43 pm

1 stop28h 23m

$546

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Mon 9/15

4:40 pm-10:14 pm

1 stop4h 34m

$165

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Mon 9/15

7:10 am-3:21 pm

2 stops31h 11m

$212

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Thu 9/18

6:00 am-3:21 pm

1 stop8h 21m

$258

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/18

Showing 1-10 of 11 results
1
2

Best time to book a flight from Ontario to Helena

Have a flexible travel schedule? Discover the best time to fly to Helena from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Ontario to Helena?

Currently, February is the cheapest month in which you can book a flight from Ontario to Helena (average of $353). Flying from Ontario to Helena in May is currently the most expensive (average of $517). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Helena

Get insights into the airlines that provide service to Helena. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Helena. Reviews last updated August 19, 2025.
Read reviews from past customers who have flown Delta from Ontario to Helena. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,981 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
Delta
8.0
Very good
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin

Related info for your journey

Find useful and relevant information for your journey from Ontario to Helena. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ontario to Helena?

    Airlines like Alaska Airlines, Delta, and United Airlines fly from Ontario to Helena in about 5h 20m. The time it takes to get you to your destination can typically vary by up to 15h 34m. There are 915 mi between Ontario and Helena. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What is the cheapest airline to fly from Ontario to Helena round-trip?

    Flying on Delta is currently your cheapest option to Helena, with prices starting at $205.

  • Can I find deals for flights from Ontario to Helena that include hotel bookings?

    Yes. In addition to deals on Ontario to Helena flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Helena?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Helena.

  • Can I find deals for business class flights from Ontario to Helena?

    Yes. Cheapflights offers flight deals from Ontario to Helena by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Helena?

    Currently, February is the cheapest month in which you can book a flight from Ontario to Helena (average of $353). Flying from Ontario to Helena in May is currently the most expensive (average of $517). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top airline flying from Ontario to Helena

Discover the top airline that operate flights from Ontario to Helena. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 19, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$205Average$410FlexibilityNo cancel feeOn-timeN/A

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