What is the cheapest airline to fly from Helena to San Francisco round-trip?

According to our current data, Delta ($246), offers the cheapest pricing from Helena to San Francisco.

What is the cheapest day to fly from Helena to San Francisco?

Travelers seeking maximum savings on their Helena to San Francisco flight should consider departing on Friday mornings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 4.4 inches per month. January is typically the wettest month, when rainfall can reach 4.4 in. July is typically the driest time to visit San Francisco when rainfall is around 0.0 in.

If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

What is the cheapest day to fly round-trip from Helena to San Francisco?

Leaving on a Sunday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 107% on the overall cost on flights from Helena to San Francisco.

What is the cheapest time of day to fly from HLN to SFO?

It’s typically best to fly out from Helena to San Francisco at noon. Doing so could potentially save you 16% on the flight price compared to flying in the morning, which is usually more expensive.

Can I find deals for flights from Helena to San Francisco that include hotel bookings?

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

How can I find direct flights from Helena to San Francisco?

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

Can I find deals for business class flights from Helena to San Francisco?

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

$264+ Flights from Helena to San Francisco

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from Helena to San Francisco with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Helena to San Francisco

Round-trip from	$264 (Hawaiian Airlines)

From Helena to San Francisco

Search Deals

Find flight deals from Helena to San Francisco

Cheapest flights from Helena to San Francisco
Explore the most affordable flight options available from Helena to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

Fri 10/34:02 pmHLN - SFO

1 stop5h 18mHawaiian Airlines

Tue 10/711:22 amSFO - HLN

1 stop5h 19mHawaiian Airlines

Deal found 8/12

$264

Tue 10/216:18 pmHLN - SFO

1 stop5h 00mAlaska Airlines

Thu 10/239:34 amSFO - HLN

1 stop7h 07mAlaska Airlines

Deal found 8/12

$303

Fri 10/34:02 pmHLN - SFO

1 stop6h 18mAlaska Airlines

Tue 10/72:04 pmSFO - HLN

2 stops26h 37mAlaska Airlines

Deal found 8/12

$318

Wed 8/274:02 pmHLN - SFO

1 stop7h 21mHawaiian Airlines

Sun 8/317:00 amSFO - HLN

1 stop7h 21mHawaiian Airlines

Deal found 8/11

$514

Fri 8/291:00 pmHLN - SFO

1 stop4h 27mDelta

Tue 9/25:03 pmSFO - HLN

1 stop4h 10mDelta

Deal found 8/13

$519

Fri 8/292:30 pmHLN - SFO

1 stop7h 33mUnited Airlines

Tue 9/29:00 pmSFO - HLN

2 stops15h 30mUnited Airlines

Deal found 8/13

$562

Wed 8/272:30 pmHLN - SFO

1 stop6h 12mUnited Airlines

Sun 8/3112:55 pmSFO - HLN

2 stops23h 35mUnited Airlines

Deal found 8/11

$581

Sat 8/306:30 amHLN - SFO

1 stop7h 52mUnited Airlines

Mon 9/110:53 pmSFO - HLN

2 stops21h 18mUnited Airlines

Deal found 8/12

$582

Wed 8/274:02 pmHLN - SFO

2 stops8h 57mAlaska Airlines

Sun 8/316:00 amSFO - HLN

2 stops8h 21mAlaska Airlines

Deal found 8/11

$682

Best flights from Helena to San Francisco
Discover carefully curated flight deals from Helena to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 14, 2025.

Fri 10/34:02 pmHLN - SFO

1 stop5h 18mHawaiian Airlines

Tue 10/711:22 amSFO - HLN

1 stop5h 19mHawaiian Airlines

Deal found 8/12

$264

Tue 10/216:18 pmHLN - SFO

1 stop5h 00mAlaska Airlines

Thu 10/239:34 amSFO - HLN

1 stop7h 07mAlaska Airlines

Deal found 8/12

$303

Fri 8/291:00 pmHLN - SFO

1 stop4h 27mDelta

Mon 9/15:35 amSFO - HLN

1 stop5h 45mDelta

Deal found 8/12

$519

Fri 8/292:30 pmHLN - SFO

1 stop7h 33mUnited Airlines

Tue 9/29:00 pmSFO - HLN

2 stops15h 30mUnited Airlines

Deal found 8/13

$562

Fri 10/34:02 pmHLN - SFO

1 stop6h 18mAlaska Airlines

Tue 10/72:04 pmSFO - HLN

2 stops26h 37mAlaska Airlines

Deal found 8/12

$318

Sat 8/304:02 pmHLN - SFO

1 stop6h 18mHawaiian Airlines

Mon 9/17:00 amSFO - HLN

1 stop7h 21mHawaiian Airlines

Deal found 8/12

$514

Fri 8/291:00 pmHLN - SFO

1 stop4h 27mDelta

Tue 9/25:03 pmSFO - HLN

1 stop4h 10mDelta

Deal found 8/13

$519

Wed 8/274:02 pmHLN - SFO

1 stop7h 21mHawaiian Airlines

Sun 8/317:00 amSFO - HLN

1 stop7h 21mHawaiian Airlines

Deal found 8/11

$514

Sat 8/305:50 amHLN - SFO

1 stop4h 14mDelta

Mon 9/15:35 amSFO - HLN

1 stop5h 45mDelta

Deal found 8/12

$519

Last-minute flights from Helena to San Francisco
Discover last-minute flight deals from Helena to San Francisco. Data last updated August 14, 2025 and is based on user searches.

Wed 8/274:02 pmHLN - SFO

1 stop7h 21mHawaiian Airlines

Sun 8/317:00 amSFO - HLN

1 stop7h 21mHawaiian Airlines

Deal found 8/11

$514

Wed 8/272:30 pmHLN - SFO

1 stop6h 12mUnited Airlines

Sun 8/3112:55 pmSFO - HLN

2 stops23h 35mUnited Airlines

Deal found 8/11

$581

Wed 8/274:02 pmHLN - SFO

2 stops8h 57mAlaska Airlines

Sun 8/316:00 amSFO - HLN

2 stops8h 21mAlaska Airlines

Deal found 8/11

$682

Fri 8/291:00 pmHLN - SFO

1 stop4h 27mDelta

Tue 9/25:03 pmSFO - HLN

1 stop4h 10mDelta

Deal found 8/13

$519

Fri 8/292:30 pmHLN - SFO

1 stop7h 33mUnited Airlines

Tue 9/29:00 pmSFO - HLN

2 stops15h 30mUnited Airlines

Deal found 8/13

$562

Fri 8/291:00 pmHLN - SFO

2 stops10h 09mDelta

Mon 9/112:30 pmSFO - HLN

2 stops8h 43mDelta

Deal found 8/12

$1,606

Sat 8/306:30 amHLN - SFO

1 stop7h 52mUnited Airlines

Mon 9/110:53 pmSFO - HLN

2 stops21h 18mUnited Airlines

Deal found 8/12

$582

Sat 8/304:02 pmHLN - SFO

2 stops6h 16mAlaska Airlines

Mon 9/16:00 amSFO - HLN

2 stops8h 21mAlaska Airlines

Deal found 8/12

$692

One-way flights from Helena to San Francisco
Search for one-way flight options from Helena to San Francisco. Find affordable one-way fares based on user searches. Data last updated August 14, 2025.

Sun 9/145:20 pmHLN - SFO

1 stop15h 30mUnited Airlines

Deal found 8/14

$357

Sun 9/145:45 amHLN - SFO

2 stops7h 00mDelta

Deal found 8/14

$978

Cheapflights Fare Finder

Use the filters below to find and compare flights from Helena to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Fri 10/3

4:02 pm-8:20 pm

1 stop5h 18m

San Francisco

Tue 10/7

11:22 am-5:41 pm

1 stop5h 19m

$264

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Tue 10/21

6:18 pm-10:18 pm

1 stop5h 00m

San Francisco

Thu 10/23

9:34 am-5:41 pm

1 stop7h 07m

$303

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Fri 10/3

4:02 pm-9:20 pm

1 stop6h 18m

San Francisco

Tue 10/7

2:04 pm-5:41 pm

2 stops26h 37m

$318

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Sat 8/30

4:02 pm-9:20 pm

1 stop6h 18m

San Francisco

Mon 9/1

7:00 am-3:21 pm

1 stop7h 21m

$514

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Wed 8/27

4:02 pm-10:23 pm

1 stop7h 21m

San Francisco

Sun 8/31

7:00 am-3:21 pm

1 stop7h 21m

$514

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Fri 8/29

1:00 pm-4:27 pm

1 stop4h 27m

San Francisco

Mon 9/1

5:35 am-12:20 pm

1 stop5h 45m

$519

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Fri 8/29

1:00 pm-4:27 pm

1 stop4h 27m

San Francisco

Tue 9/2

5:03 pm-10:13 pm

1 stop4h 10m

$519

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Sat 8/30

5:50 am-9:04 am

1 stop4h 14m

San Francisco

Mon 9/1

5:35 am-12:20 pm

1 stop5h 45m

$519

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Fri 8/29

2:30 pm-9:03 pm

1 stop7h 33m

San Francisco

Tue 9/2

9:00 pm-1:30 pm

2 stops15h 30m

$562

HelenaSan Francisco

HLN - SFO

HLNSFO

Helena

Sun 9/14

5:20 pm-7:50 am

1 stop15h 30m

$357

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 11 results

Best time to book a flight from Helena to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco 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 San Francisco

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

Currently, January is the cheapest month in which you can book a flight from Helena to San Francisco (average of $276). Flying from Helena to San Francisco in June is currently the most expensive (average of $358). 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 San Francisco

Peruse reviews from past customers who have flown with Delta from Helena to San Francisco to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,980 reviews

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

8.0

Very good

7,980 reviews

Delta

8.0

Very good

7,980 reviews

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

What is the cheapest airline to fly from Helena to San Francisco round-trip?
According to our current data, Delta ($246), offers the cheapest pricing from Helena to San Francisco.
Can I find deals for flights from Helena to San Francisco that include hotel bookings?
Yes. In addition to deals on Helena to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Helena to San Francisco?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Helena to San Francisco.
Can I find deals for business class flights from Helena to San Francisco?
Yes. Cheapflights offers flight deals from Helena to San Francisco 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 San Francisco?
Currently, January is the cheapest month in which you can book a flight from Helena to San Francisco (average of $276). Flying from Helena to San Francisco in June is currently the most expensive (average of $358). 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

Roseville

Santa Cruz

Livermore

South San Francisco

Mountain View

Turlock

Santa Clara

Hollister

Antioch

Watsonville

Manteca

Sunnyvale

Newark

Milpitas

Campbell

Foster City

San Leandro

Burlingame

Redwood City

Vallejo

Browse thousands of different options on Cheapflights for your next trip

Top airline flying from Helena to San Francisco

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$246	Average$349	FlexibilityNo cancel fee	On-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

$264+ Cheap flights from Helena to San Francisco (HLN - SFO)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/3. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Helena to San Francisco with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Helena to San Francisco

Round-trip from

Find flight deals from Helena to San Francisco

Cheapest flights from Helena to San FranciscoExplore the most affordable flight options available from Helena to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

Explore the most affordable flight options available from Helena to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Helena to San Francisco that are best for you.

Best time to book a flight from Helena to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Helena with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Helena to San Francisco

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

Reviews of airlines servicing San Francisco

Peruse reviews from past customers who have flown with Delta from Helena to San Francisco to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

What is the cheapest airline to fly from Helena to San Francisco round-trip?

Can I find deals for flights from Helena to San Francisco that include hotel bookings?

How can I find direct flights from Helena to San Francisco?

Can I find deals for business class flights from Helena to San Francisco?

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

Traveling to a place near San Francisco?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Helena to San Francisco

See prices for flight routes from nearby airports that may be better suited for you.

Top airline flying from Helena to San Francisco

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Helena to San Francisco
Explore the most affordable flight options available from Helena to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.