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$308+ Cheap flights from Helena to Ontario (HLN - ONT)

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 11/9. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — ONT
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheap flight deals from Helena to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Helena (HLN) to Ontario (ONT). 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 October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$324
(Delta)

One-way from

$299
(Delta)

Popular in

December

Cheapest in

April

Average price

$412
Provider with most accurate pricing for Helena-Ontario flight deals.
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Provider most trusted by Cheapflights users for Helena-Ontario flights.
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From Helena to Ontario
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One-way flight from Helena to Ontario
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Highest demand for flights based on searches. 24% potential increase in price ($128 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($31 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Helena to Ontario

Cheapest flights from Helena to Ontario
Explore the most affordable flight options available from Helena to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This Delta deal was found by Cheapflights users on 10/29. 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.
Sat 12/61:06 pmHLN - ONT
2 stops10h 41mDelta
Tue 12/912:40 pmONT - HLN
2 stops8h 50mDelta
Deal found 10/29$324
This Alaska Airlines deal was found by Cheapflights users on 10/29. 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.
Sat 12/66:28 pmHLN - ONT
1 stop17h 51mAlaska Airlines
Tue 12/96:00 amONT - HLN
1 stop10h 51mAlaska Airlines
Deal found 10/29$332
This Delta deal was found by Cheapflights users on 10/29. 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 12/41:06 pmHLN - ONT
2 stops10h 41mDelta
Tue 12/96:40 amONT - HLN
2 stops14h 50mDelta
Deal found 10/29$341
This Delta deal was found by Cheapflights users on 10/29. 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 12/41:06 pmHLN - ONT
2 stops10h 41mDelta
Sun 12/76:00 amONT - HLN
1 stop5h 25mDelta
Deal found 10/29$354
This United Airlines deal was found by Cheapflights users on 10/29. 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 11/152:22 pmHLN - ONT
1 stop7h 22mUnited Airlines
Fri 11/215:05 amONT - HLN
1 stop7h 22mUnited Airlines
Deal found 10/29$508
This Alaska Airlines deal was found by Cheapflights users on 10/28. 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.
Thu 11/136:13 pmHLN - ONT
1 stop6h 19mAlaska Airlines
Mon 11/176:03 pmONT - HLN
2 stops22h 33mAlaska Airlines
Deal found 10/28$520
This United Airlines deal was found by Cheapflights users on 10/28. 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.
Thu 11/132:22 pmHLN - ONT
1 stop7h 22mUnited Airlines
Mon 11/175:05 amONT - HLN
1 stop7h 22mUnited Airlines
Deal found 10/28$527
This Alaska Airlines deal was found by Cheapflights users on 10/30. 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.
Sat 11/86:13 pmHLN - ONT
1 stop17h 52mAlaska Airlines
Thu 11/134:11 pmONT - HLN
1 stop24h 25mAlaska Airlines
Deal found 10/30$572
This Delta deal was found by Cheapflights users on 10/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/81:00 pmHLN - ONT
2 stops10h 41mDelta
Sat 11/156:00 amONT - HLN
1 stop5h 26mDelta
Deal found 10/30$612
This Delta deal was found by Cheapflights users on 10/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/81:00 pmHLN - ONT
2 stops10h 41mDelta
Thu 11/1311:48 amONT - HLN
2 stops9h 42mDelta
Deal found 10/30$617
This Alaska Airlines deal was found by Cheapflights users on 10/30. 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 11/46:13 pmHLN - ONT
1 stop17h 52mAlaska Airlines
Wed 11/126:00 amONT - HLN
1 stop10h 36mAlaska Airlines
Deal found 10/30$676

Cheapflights Fare Finder

 
Customize your flight search to find flights from Helena to Ontario 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 October 30, 2025.
Use the filters below to find and compare flights from Helena to Ontario that are best for you.

Fly from

Helena

Fly to

Ontario

Route

Depart

Return

Price

HelenaOntario

HLN - ONT

HLNONT

Helena

Sat 12/6

1:06 pm-10:47 pm

2 stops10h 41m

Ontario

Tue 12/9

12:40 pm-10:30 pm

2 stops8h 50m

$324

HelenaOntario

HLN - ONT

HLNONT

Helena

Sat 12/6

6:28 pm-11:19 am

1 stop17h 51m

Ontario

Tue 12/9

6:00 am-5:51 pm

1 stop10h 51m

$332

HelenaOntario

HLN - ONT

HLNONT

Helena

Sat 12/6

6:28 pm-11:19 am

1 stop17h 51m

Ontario

Wed 12/10

6:00 am-5:51 pm

1 stop10h 51m

$332

HelenaOntario

HLN - ONT

HLNONT

Helena

Thu 12/4

1:06 pm-10:47 pm

2 stops10h 41m

Ontario

Tue 12/9

6:40 am-10:30 pm

2 stops14h 50m

$341

HelenaOntario

HLN - ONT

HLNONT

Helena

Thu 12/4

1:06 pm-10:47 pm

2 stops10h 41m

Ontario

Sun 12/7

6:00 am-12:25 pm

1 stop5h 25m

$354

HelenaOntario

HLN - ONT

HLNONT

Helena

Sat 11/15

2:22 pm-8:44 pm

1 stop7h 22m

Ontario

Fri 11/21

5:05 am-1:27 pm

1 stop7h 22m

$508

HelenaOntario

HLN - ONT

HLNONT

Helena

Thu 11/13

2:22 pm-8:44 pm

1 stop7h 22m

Ontario

Mon 11/17

5:05 am-1:27 pm

1 stop7h 22m

$527

HelenaOntario

HLN - ONT

HLNONT

Helena

Thu 11/13

6:13 pm-5:09 pm

2 stops23h 56m

Ontario

Mon 11/17

6:03 pm-5:36 pm

2 stops22h 33m

$604

HelenaOntario

HLN - ONT

HLNONT

Helena

Wed 11/26

2:22 pm-12:32 pm

1 stop23h 10m

Ontario

Sun 11/30

9:35 pm-9:22 pm

1 stop22h 47m

$809

HelenaOntario

HLN - ONT

HLNONT

Helena

Mon 12/29

6:32 pm-11:59 pm

2 stops30h 27m

Ontario

Sat 1/3

6:00 am-5:55 pm

1 stop10h 55m

$1,011

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 12 results
1
2

Compare providers for flights from Helena to Ontario

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 Helena to Ontario in October.
ProviderPrice AccuracyTrust Score*
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 Helena-Ontario flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Helena-Ontario flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Helena-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Helena-Ontario 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 Helena-Ontario 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 Helena to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Helena 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 Helena to Ontario

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

Currently, May is the cheapest month in which you can book a flight from Helena to Ontario (average of $110). Flying from Helena to Ontario in September is currently the most expensive (average of $216). 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 Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated October 30, 2025.
Get a feel of what it's like to fly with Delta from Helena to Ontario by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
7.9
Good
7,998 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Helena to Ontario. 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 Helena to Ontario?

    Delta and Alaska Airlines can get you from Helena to Ontario in just under 10h 41m. Your travel time can differ by up to 7h 10m. The distance from Helena to Ontario is about 915 mi. 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 Helena to Ontario round-trip?

    Flying on Delta is currently your cheapest option to Ontario, with prices starting at $294.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Helena to Ontario 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 Helena to Ontario?

    Currently, May is the cheapest month in which you can book a flight from Helena to Ontario (average of $110). Flying from Helena to Ontario in September is currently the most expensive (average of $216). 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 Helena to Ontario

Discover the top airline that operate flights from Helena to Ontario. 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$294Average$358FlexibilityNo cancel feeOn-timeN/A

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