HLN - SAN

$189 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 5/26. 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, 0 bags

KAYAK searches 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
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Everything you should know

Cheapest round-trip
$317
Typical prices: $462-$314
Alaska Airlines
Sat 5/2Tue 5/5
HLN - SAN • 1 stop
Cheapest one-way
$189
Delta
Tue 5/26
HLN - SAN • 1 stop
Top airlines
Cheapest • from $317 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Helena and San Diego. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $240 (round-trip)
Shortest trip • 4h 48m (one-way)
Insights
Insights
Insights
Insights
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to San Diego!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights 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 for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Helena to San Diego

Sat, May 2 - Tue, May 5
Alaska Airlines Logo
6:22 pm - 9:55 am
HLN
-
SAN
16h 33m
1 stop
Alaska Airlines Logo
7:15 am - 5:45 pm
SAN
-
HLN
9h 30m
1 stop
$317Alaska Airlines
Sat, May 2 - Tue, May 5
Alaska Airlines Logo
6:22 pm - 9:30 am
HLN
-
SAN
16h 08m
2 stops
Alaska Airlines Logo
10:51 am - 5:45 pm
SAN
-
HLN
5h 54m
1 stop
$365Alaska Airlines
Sat, May 2 - Tue, May 5
Alaska Airlines Logo
6:22 pm - 9:55 am
HLN
-
SAN
16h 33m
1 stop
Alaska Airlines Logo
10:51 am - 5:45 pm
SAN
-
HLN
5h 54m
1 stop
$387Alaska Airlines
Sat, May 2 - Tue, May 5
Alaska Airlines Logo
6:22 pm - 7:59 am
HLN
-
SAN
14h 37m
2 stops
Alaska Airlines Logo
10:51 am - 5:45 pm
SAN
-
HLN
5h 54m
1 stop
$416Alaska Airlines
Sat, May 2 - Tue, May 5
Alaska Airlines Logo
6:22 pm - 7:59 am
HLN
-
SAN
14h 37m
2 stops
Alaska Airlines Logo
8:00 am - 5:45 pm
SAN
-
HLN
8h 45m
2 stops
$427Alaska Airlines
Sat, May 2 - Tue, May 5
Alaska Airlines Logo
6:22 pm - 7:59 am
HLN
-
SAN
14h 37m
2 stops
Alaska Airlines Logo
8:00 am - 5:45 pm
SAN
-
HLN
8h 45m
2 stops
$440Alaska Airlines
Fri, Sep 11 - Sun, Sep 13
Delta Logo
5:45 am - 8:59 am
HLN
-
SAN
4h 14m
1 stop
Delta Logo
6:15 am - 12:23 pm
SAN
-
HLN
5h 08m
1 stop
$449Delta
Fri, Sep 11 - Sun, Sep 13
Alaska Airlines Logo
5:18 pm - 11:44 pm
HLN
-
SAN
7h 26m
1 stop
Alaska Airlines Logo
3:16 pm - 4:41 pm
SAN
-
HLN
24h 25m
2 stops
$477Alaska Airlines
Fri, May 22 - Mon, May 25
Delta Logo
1:03 pm - 6:45 pm
HLN
-
SAN
6h 42m
1 stop
Delta Logo
6:15 am - 12:23 pm
SAN
-
HLN
5h 08m
1 stop
$482Delta
Fri, Sep 11 - Sun, Sep 13
Alaska Airlines Logo
5:18 pm - 9:50 am
HLN
-
SAN
17h 32m
2 stops
Alaska Airlines Logo
4:00 pm - 4:41 pm
SAN
-
HLN
23h 41m
1 stop
$487Alaska Airlines
Booking Insights

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

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.

How much is a round-trip flight from Helena to San Diego?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Helena to San Diego departing in May.

Good to know

Low seasonNovember
Cheapest flight$189
Best time to beat the crowds with an average 52% drop in price.
Most popular time to fly and prices are also 5% 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 $189 for a one-way ticket and $317 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?

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

  • 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.

Reviews of the top airline 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.
7.9
DeltaOverall score based on 8406 reviews
7.9Comfort
7.8Entertainment
7.2Food
8.5Crew
8.1Boarding
Airline reviews

One of the flight attendants was a little cranky. I appreciated the free wifi and plug to charge my laptop

8.0 ExcellentBarbie, Apr 2026
BOS - SFO
Read more Delta reviews

One of the flight attendants was a little cranky. I appreciated the free wifi and plug to charge my laptop

WiFi didn’t work most of the time. The usb chargers would work only occasionally for 5 mins and wouldn’t charge after that. Had to keep trying repeatedly at each of the seats in the row.

The crew bent over backwards to thank us for flying and make us comfortable. The food service was quick and efficient. The Captain communicated and said goodbye and thank you as we departed. They really stood out!

Generally on time departures and arrivals, clean planes, sky miles membership provides great benefits (complimentary upgrades, etc).

my mom urmila patel needed a wheelchair which was not available on the curbside. she needed to walk almost 50 meters inside (at the risk of falling) and then had to wait in line to get a wheelchair (this is not ok). Once obtained she had to seat in it for 30-45 minutes for someone to take her in thru the checkin process (which was fairly smooth and easy). the lady who helped her with her checkin process was very courteous and helpful

Staff at the check-in counter were friendly, happy and helpful. They tagged our bags and sent us to “bag drop off” but were not very clear about where that was. The airport was busy we headed off in what we thought was the right direction until a gentleman waved us down and actually came after us. He was the baggage handler for Delta and recognized our “deer in the headlights “ look-he brought us to the right area (which was marked as the Southwest Airlines Drop Off) and sent us on our way. Wonderful guy, low key and working with a big smile on his face. Loved it. Loved him.

Arlene was a great flight attendant. I also liked how one of the other flight attendants gave us a heads up about snacks and asked everyone to remove their headphones when it was their turn to order. Good idea.

I haven’t flown economy in over 20 years but it was not bad. Room by my feet for my bag and seat was roomy enough. Surprised in a good way.

The cabin temperature was nice and cool. The wifi was not working.

As previously noted, this flight was great: departure was timely, the crew was friendly and attentive, and wifi connectivity was seamless. In particular, I appreciated that the flight attendant just told me to stow the laptop right before takeoff/landing, and trusted me to do so (which I did!).

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

Information on your arrival and departure airports