SAN - HLN

$227 Find Cheap Flights from San Diego to Helena - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$343
Typical prices: $458-$631
Alaska Airlines
Wed 12/5Sun 12/9
SAN - HLN • 1 stop
Cheapest one-way
$227
Typical prices: $333-$550
Alaska Airlines
Mon 12/3
SAN - HLN • 1 stop
When to travel
January
Cheapest • 25% price drop
September
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Seattle/Tacoma Intl (SEA)
Cheapest • Avg $503 (round-trip)
Salt Lake City (SLC)
Shortest trip • 5h 04m (one-way)
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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, Dec 5 - Wed, Dec 9
Alaska Airlines Logo
6:15 am - 4:12 pmSAN  San Diego-HLN Helena
8h 57m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
4:49 pm - 10:59 pmHLN  Helena-SAN San Diego
7h 10m1 stop Seattle/Tacoma Intl
$343Alaska Airlines
Mon, Dec 7 - Fri, Dec 11
Alaska Airlines Logo
6:15 am - 4:12 pmSAN  San Diego-HLN Helena
8h 57m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
4:49 pm - 1:23 pmHLN  Helena-SAN San Diego
21h 34m1 stop Seattle/Tacoma Intl
$383Alaska Airlines
Sat, Dec 5 - Wed, Dec 9
Alaska Airlines Logo
6:15 am - 4:12 pmSAN  San Diego-HLN Helena
8h 57m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
4:49 pm - 1:53 pmHLN  Helena-SAN San Diego
22h 04m2 stops Seattle/Tacoma Intl San Francisco
$391Alaska Airlines
Wed, Dec 30 - Mon, Jan 4
Alaska Airlines Logo
10:18 pm - 3:41 pmSAN  San Diego-HLN Helena
16h 23m2 stops San Jose Seattle/Tacoma Intl
Alaska Airlines Logo
4:18 pm - 1:01 pmHLN  Helena-SAN San Diego
21h 43m1 stop Seattle/Tacoma Intl
$421Alaska Airlines
Mon, Dec 7 - Fri, Dec 11
Delta Logo
6:15 am - 12:30 pmSAN  San Diego-HLN Helena
5h 15m1 stop Salt Lake City
Delta Logo
1:10 pm - 10:52 pmHLN  Helena-SAN San Diego
10h 42m2 stops Salt Lake City Seattle/Tacoma Intl
$439Delta
Mon, Dec 7 - Fri, Dec 11
Alaska Airlines Logo
7:12 am - 4:12 pmSAN  San Diego-HLN Helena
8h 00m2 stops San Francisco Seattle/Tacoma Intl
Alaska Airlines Logo
4:49 pm - 12:26 pmHLN  Helena-SAN San Diego
20h 37m2 stops Seattle/Tacoma Intl San Francisco
$459Alaska Airlines
Sat, Dec 5 - Wed, Dec 9
Alaska Airlines Logo
7:12 am - 4:12 pmSAN  San Diego-HLN Helena
8h 00m2 stops San Francisco Seattle/Tacoma Intl
Alaska Airlines Logo
4:49 pm - 12:26 pmHLN  Helena-SAN San Diego
20h 37m2 stops Seattle/Tacoma Intl San Francisco
$464Alaska Airlines
Sat, Dec 5 - Wed, Dec 9
Alaska Airlines Logo
8:06 am - 4:12 pmSAN  San Diego-HLN Helena
7h 06m2 stops Sacramento Intl Seattle/Tacoma Intl
Alaska Airlines Logo
4:49 pm - 7:40 amHLN  Helena-SAN San Diego
15h 51m2 stops Seattle/Tacoma Intl San Francisco
$469Alaska Airlines
Wed, Dec 30 - Mon, Jan 4
Alaska Airlines Logo
10:18 pm - 3:41 pmSAN  San Diego-HLN Helena
16h 23m2 stops San Jose Seattle/Tacoma Intl
Alaska Airlines Logo
4:18 pm - 7:40 amHLN  Helena-SAN San Diego
40h 22m2 stops Seattle/Tacoma Intl Oakland
$469Alaska Airlines
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 with more confidence.

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

Round-trip flights from San Diego to Helena typically range from $458 to $631. The lowest price found in the past 5 days was $343, on Alaska Airlines.

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Key details for San Diego to Helena flights

Low season

March

Cheapest flight

$227
Beat the crowds with an average 87% drop in travelers.
The most popular month to fly with an average 47% increase in travelers.
One-way 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 answers about this route, including flight times, airports, airlines and booking tips.

  • 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.

  • 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 5h 04m 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.

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

    Round-trip flights from San Diego to Helena range from $458 to $631, with an average of $528 over the past 12 months. Anything below $458 counts as a good deal.

  • 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 $343 to $1,348. That means the highest observed fare was about 4x higher than the lowest one.

  • How are flight prices from San Diego to Helena looking right now?

    One-way fares from San Diego to Helena are currently lower than usual. Average one-way flight prices are about $314, which is 8% below the typical average for this route.

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

    Helena Airport (HLN) hosts 5 major car rental companies, with daily rates averaging $84 for economy cars. Top options include:

    • Budget
    • Hertz
    • Enterprise Rent-A-Car
    • Avis
    • National

  • 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).

  • 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) - 67% of one-stop connections
    • Seattle/Tacoma Intl (SEA) - 19% of one-stop connections
    • Denver Intl (DEN) - 15% of one-stop connections

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

    Yes. Flexible dates can save you up to 28% on flights from San Diego to Helena. Saturday is the cheapest departure day at $490 round-trip on average, while Friday is the most expensive at $674, a difference of $184.

    Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

  • 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 5h 04m, compared with 6h 38m 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.

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 are flexible, aim for a Saturday departure and avoid flying on Friday. On this route, Saturday flights average $490, about $184 less than Friday fares (27% savings) based on the last 12 months.
  • If you can choose when to travel, plan your San Diego to Helena trip for January. Fares historically average $398 round-trip in that month - typically $284 less than the most expensive month, which is September (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.

    • La Quinta Inn & Suites by Wyndham Helena
    • Baymont by Wyndham Helena
    • Days Inn 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
Vacations in Helena