£172 Cheap Flights from Helena (HLN) to San Francisco (SFO)

View £172 flight on Sat, 19 Dec 2026Opens in a new window

Popular airlines from Helena, MT (HLN-Helena Regional) to San Francisco International Airport (SFO)

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 25% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap Flights from Helena (HLN) to San Francisco (SFO)

Prices were available within the past 7 days and start at £172 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frequently asked questions

How much is a flight from HLN to San Francisco Airport?
If you're travelling between Helena Regional Airport and SFO, round-trip journeys start from . This price is based on fares listed within the last 7 days on Expedia for flights departing within the next year, so don't let a good deal slip through your fingers. Book today and save yourself both money and time. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Helena Regional Airport to San Francisco Airport?
Most flights can be conveniently cancelled online, but whether or not you incur a fee depends on your airline. If you do need to cancel your escape, follow the easy instructions in the Customer Service Portal.
How do I find cheap flights from Helena Regional Airport (HLN) to SFO that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Helena Regional Airport (HLN) to SFO flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Helena Regional Airport (HLN) to SFO?
The flight distance from Helena Regional Airport (HLN) (HLN) to SFO (SFO) is 1,300 kilometres. You'll be stepping off the plane and grabbing your bags from the carousel before long.
Which airlines fly direct from HLN to SFO?
There are no direct flights, so you'll need to make at least one stop between Helena Regional Airport (HLN) and San Francisco Intl. Airport (SFO). Take advantage of the layover time to stretch your legs and grab a bite to eat.
Are Helena Regional Airport to San Francisco Airport flight tickets cheaper when they're purchased at the last minute?
Last-minute bookings from Helena Regional Airport (HLN) to San Francisco Intl. Airport (SFO) can be hit-or-miss. It is possible to score a bargain, but then again, you could miss out entirely! If you'd rather start planning your trip ahead of time, Expedia compares flight deals up to 12 months in advance. Just bear in mind that not all airlines advertise their prices so far in advance. Our suggestion? Check back often as updates are made frequently.

Frequently asked questions

How do I find cheap flights from Helena, MT (HLN-Helena Regional) to San Francisco, CA (SFO-San Francisco Intl.)?
To find a cheap flight from Helena, MT (HLN-Helena Regional) to San Francisco, CA (SFO-San Francisco Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Helena, MT (HLN-Helena Regional) to San Francisco, CA (SFO-San Francisco Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Helena, MT (HLN-Helena Regional) to San Francisco, CA (SFO-San Francisco Intl.)?
There are approximately 4 connecting flights per day from Helena, MT (HLN-Helena Regional) to San Francisco, CA (SFO-San Francisco Intl.). Some common connection points include Seattle - Tacoma Intl. (SEA), Denver Intl. (DEN), and Salt Lake City Intl. (SLC).
What is the earliest flight from Helena, MT (HLN-Helena Regional) to San Francisco, CA (SFO-San Francisco Intl.)?
The earliest flight from Helena, MT (HLN-Helena Regional) to San Francisco, CA (SFO-San Francisco Intl.) typically departs at approximately 5:30 AM local time, operated by Delta. This is a seasonal service active in January, February, March, and April. An early departure like this can help maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Helena, MT (HLN-Helena Regional) to San Francisco, CA (SFO-San Francisco Intl.)?
You'll typically find the most flights from Helena, MT (HLN-Helena Regional) to San Francisco, CA (SFO-San Francisco Intl.) on a Tuesday, with around 5 flights available. This gives you a good selection for your travel plans. Major airlines on this route include United Airlines, Delta Air Lines, and Alaska Airlines. Flight schedules are consistent throughout the week, so you'll find similar options on other days.
What are the most popular departure times for flights from Helena, MT (HLN-Helena Regional) to San Francisco, CA (SFO-San Francisco Intl.)?
The most popular departure times for flights from Helena Regional (HLN) to San Francisco Intl. (SFO) are in the early morning, from 6am to 9am. About 32% of passengers prefer this time window. United Airlines offers flights during this window. Many travelers prefer these early morning flights because they allow you to arrive at your destination with plenty of time to start your day.
How long does it take to fly from Helena, MT (HLN-Helena Regional) to San Francisco, CA (SFO-San Francisco Intl.)?
Flying from HLN to SFO with a connection usually takes about 6 hours 20 minutes, traveling roughly 817 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Helena, MT (HLN-Helena Regional) to San Francisco, CA (SFO-San Francisco Intl.)?
Select the "Business class" and "First class" filters when looking for HLN to SFO flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Helena, MT (HLN-Helena Regional) to San Francisco, CA (SFO-San Francisco Intl.) flight with Expedia?
It's easy to earn miles on a Helena, MT (HLN-Helena Regional) to San Francisco, CA (SFO-San Francisco Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia. *Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for San Francisco from Helena Regional (HLN)?
If you're planning to travel to San Francisco from Helena Regional (HLN), you can fly directly into San Francisco Intl. (SFO) Some flights may connect through major hubs like Denver Intl. (DEN), Seattle - Tacoma Intl. (SEA), Salt Lake City Intl. (SLC) before reaching San Francisco. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Helena, MT (HLN-Helena Regional) to San Francisco, CA (SFO-San Francisco Intl.) at the last minute?
Typically, booking a last minute flight from Helena, MT (HLN-Helena Regional) to San Francisco, CA (SFO-San Francisco Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Helena, MT (HLN-Helena Regional) to San Francisco, CA (SFO-San Francisco Intl.) flight and hotel package?
Securing a Helena, MT (HLN-Helena Regional) to San Francisco, CA (SFO-San Francisco Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Helena, MT (HLN-Helena Regional) to San Francisco, CA (SFO-San Francisco Intl.)?
If you booked your Helena, MT (HLN-Helena Regional) to San Francisco, CA (SFO-San Francisco Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Helena Regional
Destination airport
San Francisco Intl.
Distance
1307 km

Book with confidence

Compare flights from Helena to San Francisco easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Helena to San Francisco. Operating between them flights per day, 6 airlines cover the route. And fly direct, getting you to San Francisco Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Helena Regional to San Francisco Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Helena Regional (HLN) to San Francisco Intl. (SFO)

The easiest way to view the best deals on flights from Helena to San Francisco today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Helena Regional to San Francisco Intl. start at just and range up to .  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Helena and San Francisco
  • booking your flight during , the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Helena to San Francisco flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Helena Regional to San Francisco Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Helena to San Francisco easily and book with confidence

Explore a world of travel with Expedia

*Available to Expedia members.