SAN - HLN

$430 Find Cheap Flights from San Diego to Helena

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Diego to Helena departing on 10/10. 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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Flight 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

Fri, Oct 10 - Sun, Oct 12
Alaska Airlines Logo
7:50 pm - 5:41 pmSAN-HLN
20h 51m1 stop
Alaska Airlines Logo
6:18 pm - 11:05 pmHLN-SAN
5h 47m1 stop
$430Alaska Airlines
Find Deal
Fri, Oct 10 - Sun, Oct 12
Alaska Airlines Logo
1:54 pm - 5:41 pmSAN-HLN
26h 47m2 stops
Alaska Airlines Logo
6:18 pm - 11:05 pmHLN-SAN
5h 47m1 stop
$442Alaska Airlines
Find Deal
Fri, Oct 10 - Sun, Oct 12
Alaska Airlines Logo
1:54 pm - 5:41 pmSAN-HLN
26h 47m2 stops
Alaska Airlines Logo
6:18 pm - 7:45 amHLN-SAN
14h 27m2 stops
$524Alaska Airlines
Find Deal
Booking Insights

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
Cheapest flight$430
Best time to beat the crowds with an average 45% drop in price.
Most popular time to fly and prices are also 26% 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 $430 for a round-trip ticket.

  • 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?

    oneworld is the only airline alliance operating flights between San Diego and Helena.

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

    The two airlines most popular with KAYAK users for flights from San Diego to Helena are Alaska Airlines and Delta. With an average price for the route of $363 and an overall rating of 8.0, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of $328 and an overall rating of 7.9.

  • 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.

Reviews of the 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
7.8Comfort
7.1Food
7.0Entertainment
8.5Crew
8.1Boarding
Airline reviews

My flight wait is 3 hours delayed due to Unknown reason. We waited a very long time in the tarmac. Our flight 24 was scheduled @ 7, therefore we left my house at 330 to park our car. We were at the gate @ 530, then we were told at 6a that it will be late , we boarded at 930 but did not take off until 1015. Therefore my arranged pick up in JFK was cancelled because of no show. Before all these I got an email offers of changing my flight to a different date which I took a day earlier. I will never again take Alaska Airlines, very Inefficient and Disappointing.

10.0 ExcellentGRACE, Aug 2025SAN - JFK
Read more Alaska Airlines reviews

My flight wait is 3 hours delayed due to Unknown reason. We waited a very long time in the tarmac. Our flight 24 was scheduled @ 7, therefore we left my house at 330 to park our car. We were at the gate @ 530, then we were told at 6a that it will be late , we boarded at 930 but did not take off until 1015. Therefore my arranged pick up in JFK was cancelled because of no show. Before all these I got an email offers of changing my flight to a different date which I took a day earlier. I will never again take Alaska Airlines, very Inefficient and Disappointing.

Such great crew, from checkin to the plane. So friendly and helpful, I was genuinely impressed.

Seats extremely uncomfortable, no entertainment, no snacks, and when boarding, half of the passengers needed to check in the carry on luggage without any explanation.

The flight was jumping between being delayed and closer to schedule about 5 times. Alaska air website showed incorrect times while google had latest info. This panic was horrible to deal with.

I always heard this was a terrible airline but I was happy to experience otherwise. The seats were more comfortable than delta. They did board late and gate was a little chaotic, which is to be expected for a budget airline. I would definitely do it again for that price.

Very expensive for short flights. Can’t communicate with Alaska Air about passport issue at check-in. Also no replies to my text messages. Wanted to extend our vacation for two more days but this expensive flight ticket is called SAVER and I couldn’t make changes or cancel or get a credit even, so I paid another airline for the return trip. Extremely disappointed.

They canceled my flight then changed me $155 for the same flight the next day

Our flight time was drastically changed which caused us to lose a day of vacation

I like the new adjustable headrest. Unfortunately 2 crying children were in front of us. But it was the first time and not holding Alaska accountable for that. Alaska always seems to have everything in order professional but comfortable.

Very bad, terrible food and late by 2 hours. Then no to open aircraft doors

My husband upgraded our seats and I don't know if it was due to the type of planet was or if they didn't upgrade our seats. We were supposed to be in I believe comfort seats and they were just as tight as any other seat- no leg room and we are very tall people but at least it wasn't extremely cold. My husband did put in a complaint about our seating because he paid extra and if we would have known that the space and the tightness would have been the same, we just would have gotten the emergency row emergency row seats that we normally get. We love Delta but both our flights coming home we're not good. Oh I forgot to mention that on our flight to Hawaii our luggage wheels got broke and we had to purse new luggage on vacation then we never had this problem so we didn't know protocol and reported it after we got home only for them to tell is we only had 24hrs to report the damage. Not sure what was going on with Delta this vacation trip.

Crew was excellent. Comfort seats not as nice as other kinds of planes.

It was a great flight and the stewards and stewardess were all kind and accommodating!! The seats were comfortable and entertainment screen excellent!

There are 4 flights in consecutive gates with about the same departure time. Two flights were boarding at the same time. One was delayed or boarding would be happening at the same time. I am not sure what Delta and LAX need to do to have a better layout at the end of Terminal 2

There was a security issue at the airport and we were unable to land. We circled endlessly and then landed at another airfield for fuel. We then circled the airport again, almost landed but didn’t fully touch down before circling again. I am thankful to the crew for keeping us safe- the issue was the airline and staff at the airport getting us seats on our connecting flights. That part was hours of searching for someone and getting in double my steps.

Most aspects were good however if they assign boarding zones they ought to enforce them or why bother? My luggage from SAN-JFK-MAD was lost in NY so I without my main bag for two days upon arrival in Spain. They were helpful in tracking it and eventually delivered it to my hotel. The flub was because of a delay upon arrival in NYC. I had booked 2 1/2 hours between flights but we had to hold on the taxiway for an hour after landing while waiting for a clear gate which likely caused the baggage error.

Excellent flight, the planes were newer, they did a nice job with boarding, great service overall.

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.

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

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