SAN - HLN

$190 Find Cheap Flights from San Diego to Helena

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Diego to Helena departing on 7/14. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Helena

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Diego to Helena, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Diego to Helena, as well as popular online travel agencies
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Flights Deals

Cheap Flights from San Diego to Helena (SAN-HLN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Diego to Helena that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from San Diego to Helena

Wed, Sep 24 - Tue, Sep 30
Delta Logo
6:15 am - 12:24 pmSAN-HLN
5h 09m1 stop
Delta Logo
5:40 am - 9:04 amHLN-SAN
4h 24m1 stop
$267Delta
Find Deal
Wed, Sep 24 - Tue, Sep 30
Alaska Airlines Logo
7:15 am - 3:21 pmSAN-HLN
7h 06m1 stop
Alaska Airlines Logo
4:02 pm - 7:41 amHLN-SAN
16h 39m2 stops
$295Alaska Airlines
Find Deal
Wed, Aug 27 - Mon, Sep 1
Alaska Airlines Logo
8:15 am - 3:21 pmSAN-HLN
6h 06m1 stop
Alaska Airlines Logo
4:02 pm - 6:37 pmHLN-SAN
27h 35m2 stops
$310Alaska Airlines
Find Deal
Wed, Aug 27 - Mon, Sep 1
Delta Logo
6:15 am - 12:20 pmSAN-HLN
5h 05m1 stop
Delta Logo
5:50 am - 8:39 amHLN-SAN
3h 49m1 stop
$323Delta
Find Deal
Thu, Jul 10 - Thu, Jul 17
Delta Logo
5:00 pm - 10:47 pmSAN-HLN
4h 47m1 stop
Delta Logo
1:00 pm - 6:39 pmHLN-SAN
6h 39m1 stop
$354Delta
Find Deal
Wed, Sep 24 - Tue, Sep 30
Alaska Airlines Logo
7:59 pm - 3:21 pmSAN-HLN
18h 22m2 stops
Alaska Airlines Logo
4:02 pm - 8:52 amHLN-SAN
17h 50m2 stops
$358Alaska Airlines
Find Deal
Wed, Aug 27 - Mon, Sep 1
Alaska Airlines Logo
8:05 am - 3:21 pmSAN-HLN
30h 16m2 stops
Alaska Airlines Logo
4:02 pm - 8:29 amHLN-SAN
17h 27m2 stops
$373Alaska Airlines
Find Deal
Wed, Jul 2 - Tue, Jul 8
United Airlines Logo
7:27 pm - 4:55 pmSAN-HLN
20h 28m3 stops
United Airlines Logo
5:39 pm - 10:14 pmHLN-SAN
5h 35m1 stop
$592United Airlines
Find Deal
Wed, Jul 2 - Tue, Jul 8
United Airlines Logo
4:00 pm - 9:15 pmSAN-HLN
28h 15m2 stops
United Airlines Logo
5:39 pm - 10:14 pmHLN-SAN
5h 35m1 stop
$617United Airlines
Find Deal
Wed, Jul 2 - Tue, Jul 8
Hawaiian Airlines Logo
6:15 am - 3:31 pmSAN-HLN
8h 16m1 stop
Hawaiian Airlines Logo
4:09 pm - 10:55 pmHLN-SAN
7h 46m1 stop
$619Hawaiian Airlines
Find Deal
Useful Info

KAYAK's insights & trends for San Diego to Helena flights

Get data-powered insights and trends into flights from San Diego to Helena to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from San Diego to Helena?

The average price of all round-trip flights from San Diego to Helena clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Helena on a Saturday, as we generally find the cheapest rates on that day for this route. On the other hand, Wednesday is the most expensive day to fly from San Diego to Helena. For your return ticket, we recommend flying on a Wednesday and avoiding Mondays for the best deals.

Good to know

Low seasonJuly
High seasonMay
Cheapest flight$190
Best time to beat the crowds with an average 46% drop in price.
Most popular time to fly and prices are also 29% lower on average.
Flight from San Diego to Helena

When to book flights from San Diego to Helena

Are your dates flexible? Find out the best times to travel from San Diego to Helena based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from San Diego to Helena

  • What is the cheapest flight from San Diego to Helena?

    In the last 3 days, the lowest price for a flight from San Diego to Helena was $190 for a one-way ticket and $267 for a round-trip.

  • Do I need a passport to fly between San Diego and Helena?

    A passport is not required to fly from San Diego to Helena.

  • Which airports will I be using when flying from San Diego to Helena?

    When flying out of San Diego you will be using San Diego. You will be landing at Helena, also known as Helena.

  • Which aircraft models fly most regularly from San Diego to Helena?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from San Diego to Helena?

    SkyTeam, oneworld, and Star Alliance are the airline alliances operating flights between San Diego and Helena, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from San Diego to Helena, Delta or Alaska Airlines?

    The two airlines most popular with KAYAK users for flights from San Diego to Helena are Delta and Alaska Airlines. With an average price for the route of $397 and an overall rating of 8.0, Delta is the most popular choice. Alaska Airlines is also a great choice for the route, with an average price of $351 and an overall rating of 8.0.

  • How does KAYAK find such low prices on flights from San Diego to Helena?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from San Diego to Helena.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from San Diego to Helena?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Helena from San Diego is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from San Diego to Helena?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Helena with an airline and back to San Diego with another airline. Booking your flights between San Diego and HLN can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from San Diego to Helena?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Helena from San Diego up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top airlines flying from San Diego to Helena

 
See real verified KAYAK customer reviews for airlines flying from San Diego to Helena. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from San Diego to Helena? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Alaska AirlinesOverall score based on 10000 reviews
7.1Entertainment
8.1Boarding
7.8Comfort
7.1Food
8.5Crew
Airline reviews

The plane was delayed a bit. It wasn't a huge problem though, as we were heading back home.

8.0 ExcellentCarlos, Jun 2025SAN - AUS
Read more Alaska Airlines reviews

The plane was delayed a bit. It wasn't a huge problem though, as we were heading back home.

Flight was great. Boarding was crazy because another flight was boarding late next to ours so everyone was standing and in the way.

very good but no blankets for overnight flight or tv screens…

We were in 1st Class. Excellent service. Easy boarding. No too difficult to speak with someone on the phone. Breakfast was not eatable for me. No screen to watch movies. I don't have or want a tablet. This is first class there should be screens. Even if I had a tablet there was no place to put it. There is a place to put a tablet in economy. Seats were a bit lumpy.

A cheerful and effective crew. Tasty pre-order food options.

My youngest didn't have a assigned seat until we biard6the plane.

There was no seating at the gate, no where to charge your devices, super crowded. Boarding in group F meant all luggage space was taken when it was time for me to board. The boarding crew was short with everyone and seemed irritated. The luggage space was insufficient, the seat was too small for me (6'4") and very uncomfortable trip. I was in a middle seat between a person snoring the whole trip and a person with very strong body odor. The flight crew was terse and unfriendly, seemed irritated and impatient. Yelled a lot at people with earbuds in, understandable. Finally, we arrived 10 minutes early, only to sit on the tarmac for 20 minutes and wait for a gate. Worst flight experience I've had in years.

The flight was delayed by 3 hours and 30 minutes without any explanation.

A little delay but nice flight, nice team. Thank you.

They lock the bathrooms too soon before landing! My bladder was bursting for over an hour. Then the plane had to sit on the taxiway for 1 hour. People started rushing to the bathroom. Creating a dangerous situation.

It would be nice if was given wires ear buds. Overall was a good experience was able to sleep on the plane

737-800 in first class was pretty dumpy. Seat had an uncomfortable angle, storage under the seat was blocked so even my very modest backpack didn't fit, power outlet was flaky. Weird tiny seat pockets that couldn't hold a gallon ziploc bag, emesis bag missing, etc. etc. No in-flight service due to turbulence. Crew was excellent, boarding was smooth despite a full flight.

Delta flight was on time, seats were comfortable, and crew was nice.

Thank you for not flipping the plane on the run way. You guys get a 5 star rating for the flight!!!

Boarding is, as it always is… horrible. Gate lice. Slow moving zones. Too many people with carry ons

It was terrible, if they ran flights on time it would make a big difference.

Delta seems to be improving in many areas, except they are super bad with the food available. Bring back normal food service on long flights.

I actually received a notification from kayak on email but not one by text from Delta when my departure gait changed and I almost missed my flight

New boarding doesn't make sense. Filling front first is slow.

Delta flight was great from the check in all the way to arrival. However, I had a very bad experience. I requested a wheelchair and the wheelchair employee that went to pick me up from the plane in Boston to bring me to the baggage claims told me I have to pay him. I was under the impression that it was a free service and I usually give tips but the person forced me to pay and since I said no because I was upset with his demand when my daughter walked in to pick me up he demanded payment from my daughter who paid him thinking maybe now it is a charged service.

Everything you need to know for your flight from San Diego to Helena

Information on your arrival and departure airports

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