SAN - HLN

$293 Find Cheap Flights from San Diego to Helena - Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$293
Typical prices: $388-$532
Alaska Airlines
Wed 11/14Sat 11/17
SAN - HLN • 1 stop
When to travel
December
Cheapest • 26% price drop
September
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Seattle/Tacoma Intl (SEA)
Cheapest • Avg $445 (round-trip)
Salt Lake City (SLC)
Shortest trip • 4h 52m (one-way)
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Flight Deals

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

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from San Diego to Helena

Sat, Nov 14 - Tue, Nov 17
Alaska Airlines Logo
6:16 am - 4:04 pmSAN  San Diego-HLN Helena
8h 48m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
4:41 pm - 2:47 pmHLN  Helena-SAN San Diego
23h 06m1 stop Seattle/Tacoma Intl
$293Alaska Airlines
Sat, Nov 14 - Tue, Nov 17
Alaska Airlines Logo
9:15 am - 4:04 pmSAN  San Diego-HLN Helena
5h 49m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
4:41 pm - 7:44 pmHLN  Helena-SAN San Diego
28h 03m2 stops Seattle/Tacoma Intl Oakland
$341Alaska Airlines
Sat, Nov 14 - Tue, Nov 17
Alaska Airlines Logo
9:15 am - 4:04 pmSAN  San Diego-HLN Helena
5h 49m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
4:41 pm - 6:47 pmHLN  Helena-SAN San Diego
27h 06m1 stop Seattle/Tacoma Intl
$353Alaska Airlines
Sat, Nov 14 - Tue, Nov 17
Alaska Airlines Logo
6:16 am - 4:04 pmSAN  San Diego-HLN Helena
8h 48m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
4:41 pm - 2:47 pmHLN  Helena-SAN San Diego
23h 06m1 stop Seattle/Tacoma Intl
$368Alaska Airlines
Sat, Nov 14 - Tue, Nov 17
Alaska Airlines Logo
9:15 am - 4:04 pmSAN  San Diego-HLN Helena
5h 49m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
4:41 pm - 3:16 pmHLN  Helena-SAN San Diego
23h 35m2 stops Seattle/Tacoma Intl Sacramento Intl
$396Alaska Airlines
Sat, Nov 14 - Tue, Nov 17
Alaska Airlines Logo
4:20 pm - 4:04 pmSAN  San Diego-HLN Helena
22h 44m2 stops Sacramento Intl Seattle/Tacoma Intl
Alaska Airlines Logo
4:41 pm - 11:12 amHLN  Helena-SAN San Diego
19h 31m2 stops Seattle/Tacoma Intl Sacramento Intl
$404Alaska Airlines
Sat, Nov 14 - Tue, Nov 17
Alaska Airlines Logo
10:48 am - 4:04 pmSAN  San Diego-HLN Helena
28h 16m2 stops San Francisco Seattle/Tacoma Intl
Alaska Airlines Logo
4:41 pm - 1:36 pmHLN  Helena-SAN San Diego
21h 55m2 stops Seattle/Tacoma Intl San Francisco
$404Alaska Airlines
Fri, Nov 20 - Tue, Nov 24
Delta Logo
7:10 pm - 12:27 pmSAN  San Diego-HLN Helena
16h 17m1 stop Salt Lake City
Delta Logo
1:07 pm - 10:54 pmHLN  Helena-SAN San Diego
10h 47m2 stops Salt Lake City Seattle/Tacoma Intl
$491Delta
Sat, Nov 21 - Tue, Nov 24
Delta Logo
6:15 am - 10:32 pmSAN  San Diego-HLN Helena
15h 17m1 stop Salt Lake City
Delta Logo
1:07 pm - 10:54 pmHLN  Helena-SAN San Diego
10h 47m2 stops Salt Lake City Seattle/Tacoma Intl
$491Delta
Sat, Oct 3 - Sat, Oct 17
Delta Logo
3:00 pm - 10:29 pmSAN  San Diego-HLN Helena
6h 29m2 stops Los Angeles Los Angeles Salt Lake City
Delta Logo
1:08 pm - 10:51 pmHLN  Helena-SAN San Diego
10h 43m2 stops Salt Lake City Seattle/Tacoma Intl
$494Delta
Booking Insights

Price, demand and travel trends for San Diego to Helena flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from San Diego to Helena with more confidence.

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

Round-trip flights from San Diego to Helena start at $293. Prices are below average for this route right now, with typical round-trip fares ranging from $388 to $532. The lowest price found in the past 5 days was $293 on Alaska Airlines.

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

Friday is the cheapest day of the week to fly from San Diego to Helena, it is 23% cheaper than the average day. Sunday is the most expensive day with flight prices 30% higher than average. Based on deals found by KAYAK users in the last 12 months.

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Key details for San Diego to Helena flights

Low season

March

Cheapest flight

$293
Best time to beat the crowds with an average 2% drop in price.
Most popular time to fly and prices are also 23% 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

Your San Diego to Helena flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • Which airports can I use when flying from San Diego to Helena?

    Flights from San Diego to Helena usually depart from San Diego (SAN) and arrive at Helena (HLN).

  • What cabin classes can I book on flights from San Diego to Helena?

    Only Economy Class is available on flights from San Diego to Helena.

  • Which airports do connecting flights from San Diego to Helena pass through?

    One-stop flights from San Diego to Helena most commonly connect through:

    • Salt Lake City (SLC) - 60% of one-stop connections
    • Seattle/Tacoma Intl (SEA) - 27% of one-stop connections
    • Denver Intl (DEN) - 13% of one-stop connections

    Salt Lake City (SLC) handles the largest share of one-stop connections on this route.

  • Can I save money by using flexible dates for flights from San Diego to Helena?

    Yes. Being flexible with your travel dates can save you up to 41% on the San Diego to Helena route. Friday is the cheapest departure day at $388 round-trip on average, while Sunday is the most expensive at $655, a difference of $267. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • How long is a flight from San Diego to Helena?

    There are currently no nonstop flights available from San Diego to Helena. Flights with 1 layover take between 4h 52m and 7h 08m in total, depending on the connection.

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

    No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

  • Have flight prices from San Diego to Helena changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $293 to $932. That means the highest observed fare was about 3x higher than the lowest one.

  • How much time can I save by choosing a different layover airport from San Diego to Helena?

    Flying via Salt Lake City (SLC) gives the shortest average 1-stop total travel time at 4h 52m, compared with 6h 11m via Seattle/Tacoma Intl (SEA) and 7h 08m via Denver Intl (DEN).

  • What is the time difference between San Diego and Helena?

    Helena is 1 hour ahead of San Diego (Mountain Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

  • What car rental options are available at Helena Airport (HLN)?

    Helena Airport (HLN) hosts 5 major car rental companies, with daily rates starting from around $25 for economy cars. Top options include:
    · Budget
    · Enterprise Rent-A-Car
    · Hertz
    · Avis
    · National

  • How much should I expect to pay for a San Diego to Helena flight?

    Round-trip flights from San Diego to Helena range from $388 to $532, with an average of $502 over the past 12 months. Anything below $388 counts as a good deal.

Your guide to booking San Diego to Helena flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates can be flexible, aim for a Friday departure instead of Sunday. On this route, Friday flights average $388 - about $267 less than Sunday (41% savings) based on the last 12 months.
  • If you can choose when to travel, plan your San Diego to Helena trip for December. Fares historically average $373 round-trip in that month - typically $282 less than the most expensive month, which is June (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Helena Airport.
    - Days Inn by Wyndham Helena
    - Americas Best Value Inn & Suites Helena
    - Baymont by Wyndham Helena

More options for your flight from San Diego to Helena

Complete your trip to Helena with a hotel stay or car rental

Car rentals in Helena
Hotels in Helena
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