Find flights
Deals
Insights
When to book
FAQs & Tips
Airlines

HLN - SAN

$308 Find cheap flights from Helena to San Diego

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Helena to San Diego departing on 9/11. 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
0 bags
Thu 7/11
Thu 7/18

Search hundreds of travel sites at once for deals on flights to San Diego

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Helena to San Diego, 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 Helena to San Diego, as well as popular online travel agencies
In the last 7 days travelers have searched 44,212,782 times on KAYAK, and here is why:

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

Cheap flight deals from Helena to San Diego (HLN-SAN)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Helena to San Diego 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 and deals for you by selecting your travel dates.
Choose your dates
7:04 am - 2:32 pmHLN-SAN
8h 28m1 stop
7:00 am - 3:01 pmSAN-HLN
7h 01m1 stop
$308Alaska Airlines
Find Deal
Wed, Sep 11 - Wed, Sep 25
2:42 pm - 2:37 pmHLN-SAN
24h 55m2 stops
6:15 am - 2:04 pmSAN-HLN
6h 49m1 stop
$340Alaska Airlines
Find Deal
Fri, Nov 8 - Sat, Nov 16
5:55 am - 9:04 amHLN-SAN
4h 09m1 stop
5:15 pm - 10:35 pmSAN-HLN
4h 20m1 stop
$343Delta
Find Deal
Fri, Nov 8 - Sat, Nov 16
2:42 pm - 11:57 pmHLN-SAN
10h 15m1 stop
6:15 am - 2:04 pmSAN-HLN
6h 49m1 stop
$345Alaska Airlines
Find Deal
Fri, Nov 8 - Sat, Nov 16
2:42 pm - 12:59 pmHLN-SAN
23h 17m2 stops
8:17 am - 3:12 pmSAN-HLN
29h 55m2 stops
$372Alaska Airlines
Find Deal
Fri, Nov 8 - Sat, Nov 16
7:04 am - 5:05 pmHLN-SAN
11h 01m2 stops
8:00 am - 3:01 pmSAN-HLN
6h 01m1 stop
$403Alaska Airlines
Find Deal
Wed, Sep 11 - Wed, Sep 25
1:11 pm - 4:06 pmHLN-SAN
3h 55m1 stop
6:25 am - 12:31 pmSAN-HLN
5h 06m1 stop
$488Delta
Find Deal
Wed, Aug 7 - Wed, Aug 14
2:30 pm - 10:25 pmHLN-SAN
8h 55m1 stop
7:00 am - 9:18 pmSAN-HLN
13h 18m1 stop
$634United Airlines
Find Deal
Fri, Jun 28 - Mon, Jul 1
6:45 am - 11:02 amHLN-SAN
5h 17m1 stop
6:16 am - 9:18 pmSAN-HLN
14h 02m2 stops
$642United Airlines
Find Deal
Wed, Aug 7 - Wed, Aug 14
2:30 pm - 10:01 amHLN-SAN
20h 31m2 stops
7:26 pm - 9:18 pmSAN-HLN
24h 52m3 stops
$810United Airlines
Find Deal
Fri, Jun 28 - Mon, Jul 1

Flights from Helena to San Diego - Travel Insights & Trends

Get data-powered insights and trends into flights from Helena to San Diego 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 Helena to San Diego?

The average price of all flights from Helena to San Diego clicked on KAYAK for each day over the last 12 months.
If you are looking for a flight deal from Helena to San Diego, look for departures on Saturdays and avoid leaving on a Thursday, as it's usually the priciest day. When flying back from San Diego, Monday is the cheapest day to fly and Friday is the most expensive.

What is the cheapest month to fly from Helena to San Diego?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Helena to San Diego, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Helena to San Diego is January, where tickets cost $366 on average. On the other hand, the most expensive months are December and July, where the average cost of tickets is $686 and $607 respectively.

Good to know

Low season

April

High season

February

Cheapest flight

$308
Best time to beat the crowds with an average 14% drop in price.
Most popular time to fly and prices are also 7% lower on average.
Flight from Helena to San Diego

When to book flights from Helena to San Diego

Are your dates flexible? Find out the best times to travel from Helena to San Diego 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 Helena to San Diego

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

    In the last 3 days, the lowest price for a flight from Helena to San Diego was $308 for a round-trip ticket.

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

    No, a passport isn't needed to fly from Helena to San Diego. However, local authorities might ask for an official ID.

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

    Helena and San Diego are both served by 1 main airport. You will leave Helena from Helena and will be arriving at San Diego.

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

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

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

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

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

    The two airlines most popular with KAYAK users for flights from Helena to San Diego are Delta and Alaska Airlines. With an average price for the route of $537 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 $390 and an overall rating of 8.0.

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

    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 Helena to San Diego.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Diego from Helena 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 Helena to San Diego?

    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 San Diego with an airline and back to Helena with another airline. Booking your flights between Helena and SAN 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 Helena to San Diego?

    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 San Diego from Helena up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top airlines flying from Helena to San Diego

 
See real verified KAYAK customer reviews for airlines flying from Helena to San Diego. 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 Helena to San Diego? 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 9267 reviews
7.3Food
8.6Crew
7.3Entertainment
8.2Boarding
7.9Comfort
Airline reviews

I had never flown Alaska Airlines before. I’ll definitely use them again. Seats were comfortable and roomier than expected.

10.0 ExcellentBernice, Jun 2024EWR - SAN
Read more about Alaska Airlines reviews

I had never flown Alaska Airlines before. I’ll definitely use them again. Seats were comfortable and roomier than expected.

I like the big picture of the Eskimo on the tail of the plane.

The crew was the best I’ve had the experience of flying with. A misbehaving child was making things difficult for me with bopping my tray table, taking my snack, and continually tapping or bumping me. The crew quietly and respectfully moved me to another seat, and thanked me for my patience. They couldn’t have been more kind. Their professionalism really stood out to me and I am more than happy to leave a great review for them!

I wasn't impressed with the entertainment selection, and the snack sizes were small. But the entire crew was professional and did a great job. For that I would fly Alaska again.

In economy, there was actually a decent amount of legroom and it was shocking to be in a bathroom that actually had a little bit of space! It was far more spacious than Most airlines are today. It was pleasant because of that.

Seats are uncomfortable but let room was adequate. The snack is pretty weak and the staff not particularly friendly.

Crew was outstanding. Flight was fine. Food was a joke! I didn't get the priority I paid for!! That pissed me off since I paid extra!!!

I liked the price of the 2 way tix. I hated having to pay $8.00 for Internet access. It should be free. Legroom and seats are very confining.

The one stewardess was rude about helping me put my bag in overhead….she said “ Is it heavy ?” (I am 73 yrs old)

The flight was late getting in, so many were stressed. The snacks for a LONG flight was not enough.

It was good until there was a 3 hour delay because there was not any pilots to fly the plane.

Had to change aircraft due to a faulty door. Surprisingly it only caused about an hour and a half of delay. Delta handled this situation as well as can be expected.

Your crew could maybe answer the call bell at least one of the times I pressed it. I pressed it first time with 2.5 hours left in our flight bc my partner was hungry and wanted a sandwich. We finally got the sandwich with 40 mins left in the flight.

The Flight crew didn’t serve us until about 1.5 hours into the flight because of turbulence but after it ended it was fine to move around. They served us water only and snacks and then NEVER, NOT ONE TIME came through to collect trash until right before landing about 1.5 hours later. There was absolutely no need for that. They crew was just standing around talking and visiting with each other and really never tried to see if we might want something besides water or even try to come pick up trash. This is VERY unusual for a Delta flight but it was not what I would have expected for a 4 hour flight.

There was a loud squeaky sound the whole time we were flying.

Had a broken tray in business class. Crew just shrugged it off.

I didn’t like that I could not select my seat and was assigned a seat when I checked in at LAX

Great experience overall. Check in at Austin was congested as they only have about 6 check in kiosks, one was broken, and there was a lot of Spring Break travelers.

Bag drop off was slow and annoying. Only 2 agents at the entire delta desk, and no one directing traffic for what line to be in, many confused people slowed down the process. Boarding was fine. Seats in Delta comfort plus were fine. Snacks were great! Definitely a bonus. The entertainment system was awful — old, slow, not responsive, and completely unable to play games due to some kind of error. But on the other hand, thank you to Delta for the free WiFi. That made it better.

Everything was very good other than I had selected a specific seat when I booked the flight and they changed it once I checked-in the day before my flight. I was still in first class but lost my aisle seat for a window seat. Being tall, the aisle offers more comfort so I always select an aisle seat.

Book cheap flights from Helena to San Diego

One-way flight deals

multi-stopMultiple Airlines
997 miHLN-SAN

Search by stops

Helena - San Diego Flights

Departure:

Helena (HLN)United States

Destination:

San Diego (SAN)United States

Return flight deals:

San Diego - Helena

Cabin classes: