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Ontario

$175+ 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 3/1. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — ONT
Mar 6 — Mar 131
Fri 3/6
Fri 3/13
1 adult, Economy
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Cheap 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 February 4, 2026.

This United Airlines deal was found by Cheapflights users on 2/2. 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 2/252:25 pm
HLN
-
ONT
1 stop7h 25m
United Airlines
Wed 3/115:15 am
ONT
-
HLN
1 stop7h 23m
United Airlines
Deal found 2/2$217
This Delta deal was found by Cheapflights users on 2/2. 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 2/255:30 am
HLN
-
ONT
2 stops9h 24m
Delta
Wed 3/116:00 am
ONT
-
HLN
1 stop5h 21m
Delta
Deal found 2/2$222
This Alaska Airlines deal was found by Cheapflights users on 2/3. 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.
Wed 2/254:36 pm
HLN
-
ONT
1 stop7h 08m
Alaska Airlines
Sat 2/286:14 am
ONT
-
HLN
1 stop8h 45m
Alaska Airlines
Deal found 2/3$283
This Delta deal was found by Cheapflights users on 2/2. 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 3/141:02 pm
HLN
-
ONT
1 stop4h 26m
Delta
Sat 3/286:00 am
ONT
-
HLN
1 stop5h 21m
Delta
Deal found 2/2$328
This Alaska Airlines deal was found by Cheapflights users on 2/2. 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 3/316:22 pm
HLN
-
ONT
1 stop6h 37m
Alaska Airlines
Mon 4/67:08 pm
ONT
-
HLN
1 stop21h 37m
Alaska Airlines
Deal found 2/2$343
This Delta deal was found by Cheapflights users on 2/3. 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.
Sun 3/81:02 pm
HLN
-
ONT
2 stops10h 31m
Delta
Sat 3/216:00 am
ONT
-
HLN
1 stop5h 21m
Delta
Deal found 2/3$360
This Alaska Airlines deal was found by Cheapflights users on 2/2. 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 4/16:22 pm
HLN
-
ONT
1 stop6h 37m
Alaska Airlines
Mon 4/67:08 pm
ONT
-
HLN
1 stop21h 37m
Alaska Airlines
Deal found 2/2$368
This Delta deal was found by Cheapflights users on 2/2. 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 3/131:02 pm
HLN
-
ONT
1 stop4h 26m
Delta
Sat 3/286:00 am
ONT
-
HLN
1 stop5h 21m
Delta
Deal found 2/2$375

Find 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 February 4, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$217
(United Airlines)

One-way from

$175
(Alaska Airlines)

Popular in

November

Cheapest in

February

Average price

$261
Provider with most accurate pricing for Helena-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Helena-Ontario flights.
Search Deals
From Helena to Ontario
Search Deals
One-way flight from Helena to Ontario
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($55 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 February 4, 2026.
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

Wed 2/25

2:25 pm-8:50 pm

1 stop7h 25m

Ontario

Wed 3/11

5:15 am-1:38 pm

1 stop7h 23m

$217

HelenaOntario

HLN - ONT

HLNONT

Helena

Wed 2/25

5:30 am-1:54 pm

2 stops9h 24m

Ontario

Wed 3/11

6:00 am-12:21 pm

1 stop5h 21m

$222

HelenaOntario

HLN - ONT

HLNONT

Helena

Wed 2/25

4:36 pm-10:44 pm

1 stop7h 08m

Ontario

Sat 2/28

6:14 am-3:59 pm

1 stop8h 45m

$283

HelenaOntario

HLN - ONT

HLNONT

Helena

Sat 3/14

1:02 pm-4:28 pm

1 stop4h 26m

Ontario

Sun 3/29

6:00 am-12:21 pm

1 stop5h 21m

$328

HelenaOntario

HLN - ONT

HLNONT

Helena

Tue 3/31

6:22 pm-11:59 pm

1 stop6h 37m

Ontario

Mon 4/6

7:08 pm-5:45 pm

1 stop21h 37m

$343

HelenaOntario

HLN - ONT

HLNONT

Helena

Sun 3/8

1:02 pm-10:33 pm

2 stops10h 31m

Ontario

Sat 3/21

6:00 am-12:21 pm

1 stop5h 21m

$360

HelenaOntario

HLN - ONT

HLNONT

Helena

Wed 4/1

6:22 pm-11:59 pm

1 stop6h 37m

Ontario

Mon 4/6

7:08 pm-5:45 pm

1 stop21h 37m

$368

HelenaOntario

HLN - ONT

HLNONT

Helena

Fri 3/13

1:02 pm-4:28 pm

1 stop4h 26m

Ontario

Sat 3/28

6:00 am-12:21 pm

1 stop5h 21m

$375

HelenaOntario

HLN - ONT

HLNONT

Helena

Sun 3/1

4:36 pm-11:32 pm

1 stop7h 56m

$175

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/2

  • Most accurate provider: When it comes to deals on Helena-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Helena-Ontario flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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, January is the cheapest month in which you can book a flight from Helena to Ontario (average of $108). Flying from Helena to Ontario in September is currently the most expensive (average of $229). 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 February 4, 2026.
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
8,138 reviews

Comfort

7.9

Food

7.2

Crew

8.5

Boarding

8.1

Entertainment

7.8

Overall

7.9

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
8,138 reviews
Delta
7.9
Good
8,138 reviews

Comfort

7.9

Food

7.2

Crew

8.5

Boarding

8.1

Entertainment

7.8

Overall

7.9

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?

    United Airlines, Delta, and Alaska Airlines can get you from Helena to Ontario in just under 7h 08m. Your travel time can differ by up to 2h 16m. 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, January is the cheapest month in which you can book a flight from Helena to Ontario (average of $108). Flying from Helena to Ontario in September is currently the most expensive (average of $229). 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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Alternative routes for Helena to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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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 February 4, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$294Average$403FlexibilityNo cancel feeOn-timeN/A

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