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Helena

$175+ 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 5/12. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — HLN
Jan 2 — Jan 91
Fri 1/2
Fri 1/9
1 adult, Economy
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Cheap 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 December 3, 2025.

This Delta deal was found by Cheapflights users on 12/1. 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.
Tue 12/166:00 amONT - HLN
1 stop5h 25mDelta
Sat 12/201:11 pmHLN - ONT
1 stop4h 01mDelta
Deal found 12/1$527
This United Airlines deal was found by Cheapflights users on 12/3. 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.
Fri 12/191:40 pmONT - HLN
1 stop6h 51mUnited Airlines
Mon 12/226:10 amHLN - ONT
1 stop7h 28mUnited Airlines
Deal found 12/3$597
This United Airlines deal was found by Cheapflights users on 12/3. 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.
Fri 12/121:34 pmONT - HLN
1 stop6h 48mUnited Airlines
Sun 12/146:30 amHLN - ONT
1 stop7h 02mUnited Airlines
Deal found 12/3$617
This Delta deal was found by Cheapflights users on 12/3. 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 12/1812:40 pmONT - HLN
2 stops8h 50mDelta
Mon 12/221:11 pmHLN - ONT
1 stop4h 01mDelta
Deal found 12/3$642
This United Airlines deal was found by Cheapflights users on 12/1. 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.
Sun 12/75:05 amONT - HLN
1 stop7h 42mUnited Airlines
Mon 12/82:30 pmHLN - ONT
1 stop7h 12mUnited Airlines
Deal found 12/1$677
This Delta deal was found by Cheapflights users on 12/1. 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.
Sun 12/76:00 amONT - HLN
1 stop5h 25mDelta
Mon 12/81:06 pmHLN - ONT
2 stops10h 41mDelta
Deal found 12/1$717
This United Airlines deal was found by Cheapflights users on 12/1. 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 12/35:05 amONT - HLN
1 stop7h 42mUnited Airlines
Fri 12/56:30 amHLN - ONT
1 stop7h 02mUnited Airlines
Deal found 12/1$737
This Alaska Airlines deal was found by Cheapflights users on 12/3. 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 12/121:26 pmONT - HLN
2 stops27h 25mAlaska Airlines
Sun 12/146:28 pmHLN - ONT
1 stop6h 01mAlaska Airlines
Deal found 12/3$815
This Alaska Airlines deal was found by Cheapflights users on 11/30. 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.
Tue 12/26:00 amONT - HLN
1 stop10h 51mAlaska Airlines
Wed 12/246:32 pmHLN - ONT
1 stop6h 42mAlaska Airlines
Deal found 11/30$900

Find 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 December 3, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$237
(Delta)

One-way from

$175
(Delta)

Popular in

February

Cheapest in

September

Average price

$436
Provider with most accurate pricing for Ontario-Helena flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Helena flights.
Search Deals
From Ontario to Helena
Search Deals
One-way flight from Ontario to Helena
Search Deals
Highest demand for flights based on searches. 28% potential increase in price ($167 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 10% potential price decrease ($40 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 3, 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

Sat 1/17

6:00 am-12:27 pm

1 stop5h 27m

Helena

Wed 1/21

1:10 pm-4:15 pm

1 stop4h 05m

$237

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Sat 1/17

11:53 am-6:11 pm

1 stop5h 18m

Helena

Wed 1/21

6:48 pm-10:59 am

1 stop17h 11m

$262

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Sat 5/2

6:00 am-3:38 pm

1 stop8h 38m

Helena

Thu 5/7

4:10 pm-10:38 pm

1 stop7h 28m

$348

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Thu 1/15

11:53 am-6:11 pm

1 stop5h 18m

Helena

Sun 1/18

6:48 pm-11:56 pm

1 stop6h 08m

$409

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Mon 4/6

6:55 pm-3:38 pm

1 stop19h 43m

Helena

Thu 4/9

4:10 pm-10:38 pm

1 stop7h 28m

$511

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Tue 5/12

5:05 pm-10:34 pm

1 stop4h 29m

$175

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Tue 5/12

1:00 pm-8:59 pm

1 stop6h 59m

$175

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Tue 5/12

6:00 pm-3:31 pm

2 stops20h 31m

$313

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/2

Compare providers for flights from Ontario to Helena

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Helena in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Helena flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Helena flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Ontario-Helena flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Helena flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Helena flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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, May is the cheapest month in which you can book a flight from Ontario to Helena (average of $90). Flying from Ontario to Helena in November is currently the most expensive (average of $209). 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 December 3, 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
7.9
Good
8,011 reviews

Food

7.3

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

7.9

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
7.9
Good
8,011 reviews
Delta
7.9
Good
8,011 reviews

Food

7.3

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

7.9

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 Delta and Alaska Airlines fly from Ontario to Helena in about 5h 18m. The time it takes to get you to your destination can typically vary by up to 09m. 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 $184.

  • 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, May is the cheapest month in which you can book a flight from Ontario to Helena (average of $90). Flying from Ontario to Helena in November is currently the most expensive (average of $209). 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 December 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$205Average$410FlexibilityNo cancel feeOn-timeN/A

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