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$247 Find cheap flights from Helena to San Diego

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Helena to San Diego departing on 6/18. 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
Sat 6/29
Sat 7/6

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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 42,686,544 times on KAYAK, and here is why:

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

 
These are the cheapest deals for flights from Helena to San Diego currently on KAYAK along with options from the most popular airlines KAYAK users selected for this route. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Helena to San Diego

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Helena to San Diego.

Recent one-way flight deals from Helena to San Diego

Only flying one-way? Below are some of the best one-way flight deals from Helena to San Diego found on KAYAK recently.

Recent last minute flight deals from Helena to San Diego

Leaving soon but still want a bargain? Check out these latest deals for last minute flights from Helena to San Diego.

Recent direct flight deals from Helena to San Diego

The latest deals for direct flights from Helena to San Diego so you can sit back and relax without the need for a layover.

Cheap bus & train deals from Helena to San Diego

Find recent round-trip train or bus tickets from Helena to San Diego.

All round-trip flight deals to San Diego

The cheapest plane tickets to San Diego found on KAYAK recently.
Discover the best prices and deals for you by selecting your travel dates.
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5:55 am - 9:04 amHLN-SAN
4h 09m1 stop
5:15 pm - 10:35 pmSAN-HLN
4h 20m1 stop
$308Delta
Find Deal
Sat, Oct 5 - Tue, Oct 15
4:13 pm - 11:58 amHLN-SAN
20h 45m1 stop
6:15 am - 3:33 pmSAN-HLN
8h 18m1 stop
$335Alaska Airlines
Find Deal
Tue, Oct 1 - Wed, Oct 16
4:13 pm - 9:33 pmHLN-SAN
6h 20m1 stop
8:00 am - 3:33 pmSAN-HLN
6h 33m1 stop
$343Alaska Airlines
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Thu, Oct 3 - Wed, Oct 16
4:13 pm - 8:20 amHLN-SAN
17h 07m2 stops
8:00 am - 3:33 pmSAN-HLN
6h 33m1 stop
$346Alaska Airlines
Find Deal
Tue, Oct 1 - Wed, Oct 16
2:42 pm - 1:05 pmHLN-SAN
23h 23m2 stops
6:15 am - 2:04 pmSAN-HLN
6h 49m1 stop
$350Alaska Airlines
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Fri, Nov 8 - Sat, Nov 16
1:04 pm - 11:01 pmHLN-SAN
10h 57m2 stops
5:15 pm - 10:35 pmSAN-HLN
4h 20m1 stop
$368Delta
Find Deal
Sat, Oct 5 - Wed, Oct 16
1:19 pm - 10:25 pmHLN-SAN
10h 06m2 stops
5:15 pm - 10:45 pmSAN-HLN
4h 30m1 stop
$431Delta
Find Deal
Tue, Jun 25 - Sat, Jun 29
6:45 am - 11:11 amHLN-SAN
5h 26m1 stop
10:44 pm - 1:50 pmSAN-HLN
14h 06m2 stops
$453United Airlines
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Thu, Oct 3 - Mon, Oct 14
2:25 pm - 9:00 pmHLN-SAN
7h 35m1 stop
12:45 pm - 9:29 pmSAN-HLN
7h 44m1 stop
$478United Airlines
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Fri, Oct 4 - Sat, Oct 12
2:25 pm - 9:00 pmHLN-SAN
7h 35m1 stop
7:09 am - 1:50 pmSAN-HLN
5h 41m1 stop
$513United Airlines
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Fri, Oct 4 - Sun, Oct 13
7:00 am - 8:36 amHLN-SAN
26h 36m1 stop
$247Alaska Airlines
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Tue, Jun 18
3:42 pm - 3:42 pmHLN-SAN
25h 00m2 stops
$296Alaska Airlines
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Tue, Jun 18
6:53 am - 10:24 pmHLN-SAN
16h 31m3 stops
$803United Airlines
Find Deal
Tue, Jun 18
6:53 am - 8:50 pmHLN-SAN
14h 57m1 stop
6:40 am - 9:26 pmSAN-HLN
13h 46m1 stop
$605United Airlines
Find Deal
Tue, Jun 4 - Tue, Jun 18
6:53 am - 11:59 pmHLN-SAN
18h 06m2 stops
6:40 am - 9:26 pmSAN-HLN
13h 46m1 stop
$610United Airlines
Find Deal
Tue, Jun 4 - Tue, Jun 18
6:53 am - 8:50 pmHLN-SAN
14h 57m1 stop
6:40 am - 9:26 pmSAN-HLN
13h 46m1 stop
$625United Airlines
Find Deal
Tue, Jun 4 - Wed, Jun 19
6:53 am - 5:52 pmHLN-SAN
11h 59m2 stops
6:40 am - 9:26 pmSAN-HLN
13h 46m1 stop
$630United Airlines
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Tue, Jun 4 - Wed, Jun 19
6:53 am - 11:59 pmHLN-SAN
18h 06m2 stops
11:01 am - 9:26 pmSAN-HLN
9h 25m2 stops
$662United Airlines
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Tue, Jun 4 - Tue, Jun 18
7:00 am - 2:27 pmHLN-SAN
8h 27m1 stop
4:55 pm - 11:59 pmSAN-HLN
6h 04m1 stop
$738Alaska Airlines
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Tue, Jun 4 - Mon, Jun 24
5:50 am - 5:29 pmHLN-SAN
12h 39m2 stops
5:15 pm - 10:45 pmSAN-HLN
4h 30m1 stop
$913Delta
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Tue, Jun 4 - Mon, Jun 24
1:24 pm - 6:13 pmHLN-SAN
5h 49m1 stop
6:25 am - 12:39 pmSAN-HLN
5h 14m1 stop
$918Delta
Find Deal
Tue, Jun 4 - Fri, Jun 21
5:50 am - 10:56 pmHLN-SAN
18h 06m2 stops
6:25 am - 12:39 pmSAN-HLN
5h 14m1 stop
$943Delta
Find Deal
Tue, Jun 4 - Fri, Jun 21
5:50 am - 9:04 amHLN-SAN
4h 14m1 stop
6:25 am - 10:45 pmSAN-HLN
15h 20m1 stop
$952Delta
Find Deal
Tue, Jun 4 - Sat, Jun 22

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.

Which airlines provide the cheapest flights from Helena to San Diego?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
The cheapest return flight ticket from Helena to San Diego found by KAYAK users in the last 72 hours was for $308 on Delta, followed by Alaska Airlines ($335). One-way flight deals have also been found from as low as $247 on Alaska Airlines and from $803 on United Airlines.

Good to know

Low season

April

High season

February

Cheapest flight

$247
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 $247 for a one-way ticket and $308 for a round-trip.

  • 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, Star Alliance, and SkyTeam 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 9192 reviews
7.9Comfort
7.3Entertainment
7.3Food
8.2Boarding
8.6Crew
Airline reviews

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

8.0 ExcellentAnonymous, May 2024PDX - SAN
Read more about Alaska Airlines reviews

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.

The whole experience went very well except the rest rooms were a disaster

Everything was great. Flight was on time with no issues. It was a short connecting flight so ww didn't have food offered. The gate we got off at was very close to our connecting flight gate so that was very easy.

Wasn’t an Alaska plane so the seats were very thinly padded- glad I wasn’t going further.

Flight was late but crew was very efficient and friendly.

It was great; it was on time, everything went smoothly, the crew was excellent. It was just uncomfortable for the usual reasons; completely full fight, could barely move because the space was so small. The expected stuff with every airline.

My boarding pass birthdate was printed incorrectly causing me to spend an extra hour in a check-in and then again TSA line and to miss a chance to have dinner pre-flight. My window seat was given away and was replaced with a middle seat. I would have liked an opportunity to charge my phone and take advantage of movies but many of the departure gate chargers weren’t operational and I don’t know of an in-flight charging option, The flight left 45 late after trouble with unruly passengers, and I was glad staff removed them.

Good - San Jose security is a breeze. Exact opposite of San Diego. Flight on time. Bad - FA's were not that cheery or polite. I thought we may blow out a tire as the pilot slammed down a hard landing in perfect conditions. He came in pretty hot like he had a date waiting.

I was seated at the back of the plane and the flight attendants were fantastic. I did not get food so can’t say. Thought the movie selection was lean.

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.

Flight diverted in SD. Later take off in Seattle by 1.3hrs

Book cheap flights from Helena to San Diego

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Helena to San Diego found on KAYAK in the last 72 hours.
6/18Tue
1 stopAlaska Airlines
26h 36mHLN-SAN
$247
6/18Tue
2 stopsAlaska Airlines
25h 00mHLN-SAN
$296
6/18Tue
3 stopsUnited Airlines
16h 31mHLN-SAN
$803

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Last minute flights from Helena to San Diego

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Helena to San Diego that are departing in the next 10 days.
6/4Tue
multi-stopUnited Airlines
14h 57mHLN-SAN
6/18Tue
multi-stopUnited Airlines
13h 46mSAN-HLN
$605
6/4Tue
multi-stopUnited Airlines
18h 06mHLN-SAN
6/18Tue
multi-stopUnited Airlines
13h 46mSAN-HLN
$610
6/4Tue
multi-stopUnited Airlines
14h 57mHLN-SAN
6/19Wed
multi-stopUnited Airlines
13h 46mSAN-HLN
$625
6/4Tue
multi-stopUnited Airlines
11h 59mHLN-SAN
6/19Wed
multi-stopUnited Airlines
13h 46mSAN-HLN
$630
6/4Tue
multi-stopUnited Airlines
18h 06mHLN-SAN
6/18Tue
multi-stopUnited Airlines
9h 25mSAN-HLN
$662
6/4Tue
multi-stopAlaska Airlines
8h 27mHLN-SAN
6/24Mon
multi-stopAlaska Airlines
6h 04mSAN-HLN
$738
6/4Tue
multi-stopDelta
12h 39mHLN-SAN
6/24Mon
multi-stopDelta
4h 30mSAN-HLN
$913
6/4Tue
multi-stopDelta
5h 49mHLN-SAN
6/21Fri
multi-stopDelta
5h 14mSAN-HLN
$918
6/4Tue
multi-stopDelta
18h 06mHLN-SAN
6/21Fri
multi-stopDelta
5h 14mSAN-HLN
$943
6/4Tue
multi-stopDelta
4h 14mHLN-SAN
6/22Sat
multi-stopDelta
15h 20mSAN-HLN
$952

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Helena - San Diego Flights

Departure:

Helena (HLN)United States

Destination:

San Diego (SAN)United States

Return flight deals:

San Diego - Helena

Cabin classes: