What airlines fly to Helena?

Delta, Alaska Airlines and Southwest are the top three most popular airlines that fly to Helena from San Diego according to our data. Delta is the first choice among our users, with 43% of people opting to fly with this airline when traveling to Helena. Keep in mind that there are 6 different airlines that fly to Helena on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from San Diego Airport to Helena Airport?

Prices for flights from San Diego Airport to Helena Airport are updated daily.

How many operators does momondo search for flights from San Diego Airport to Helena Airport?

As of August 2025, there is 1 operator available to choose from for flights from San Diego Airport to Helena Airport.

How old do you have to be to fly from San Diego Airport to Helena Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Diego Airport to Helena Airport.

What documentation or ID do you need to fly to Helena Airport?

The required travel and health documents for your Helena Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Helena Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$285 Cheap Flights from San Diego to Helena in 2025

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Find the cheapest flights from San Diego to Helena

Round-trip

One-way

Cheap round-trip flights

3:45 pm - 3:21 pmSAN-HLN

22h 36m1 stop

4:02 pm - 9:57 pmHLN-SAN

6h 55m1 stop

$303Alaska Airlines

Find Deal

Fri, Sep 19 - Wed, Sep 24

1:55 pm - 3:21 pmSAN-HLN

24h 26m2 stops

4:02 pm - 9:57 pmHLN-SAN

6h 55m1 stop

$315Alaska Airlines

Find Deal

Fri, Sep 19 - Wed, Sep 24

5:30 pm - 3:21 pmSAN-HLN

20h 51m1 stop

4:02 pm - 10:58 pmHLN-SAN

7h 56m1 stop

$328Alaska Airlines

Find Deal

Fri, Sep 19 - Thu, Sep 25

10:18 pm - 3:21 pmSAN-HLN

16h 03m2 stops

4:02 pm - 8:38 pmHLN-SAN

5h 36m1 stop

$340Alaska Airlines

Find Deal

Fri, Sep 19 - Thu, Sep 25

8:59 pm - 3:21 pmSAN-HLN

17h 22m2 stops

4:02 pm - 8:52 amHLN-SAN

17h 50m2 stops

$341Alaska Airlines

Find Deal

Fri, Sep 19 - Wed, Sep 24

8:33 am - 3:21 pmSAN-HLN

29h 48m2 stops

4:02 pm - 8:52 amHLN-SAN

17h 50m2 stops

$351Alaska Airlines

Find Deal

Fri, Sep 19 - Thu, Sep 25

8:59 pm - 5:41 pmSAN-HLN

19h 42m2 stops

6:18 pm - 2:17 pmHLN-SAN

20h 59m2 stops

$378Alaska Airlines

Find Deal

Fri, Oct 10 - Mon, Oct 13

6:25 pm - 5:41 pmSAN-HLN

22h 16m1 stop

6:18 pm - 11:05 pmHLN-SAN

5h 47m1 stop

$388Alaska Airlines

Find Deal

Fri, Oct 10 - Sun, Oct 12

5:00 pm - 10:13 pmSAN-HLN

4h 13m1 stop

5:50 am - 8:39 amHLN-SAN

3h 49m1 stop

$518Delta

Find Deal

Mon, Aug 18 - Sun, Aug 24

7:27 pm - 4:04 pmSAN-HLN

19h 37m3 stops

5:20 pm - 8:16 pmHLN-SAN

27h 56m2 stops

$691United Airlines

Find Deal

Mon, Aug 18 - Sun, Aug 24

Alaska Airlines flights from San Diego to Helena

Our best Alaska Airlines deals on San Diego to Helena flight tickets

Alaska Airlines

Sep 19

SAN3:45 pmSan Diego

22h 36m

1 stop

HLN3:21 pmHelena

Sep 24

HLN4:02 pmHelena

6h 55m

1 stop

SAN9:57 pmSan Diego

$303

Find similar

Alaska Airlines

Sep 19

SAN1:55 pmSan Diego

24h 26m

2 stops

HLN3:21 pmHelena

Sep 24

HLN4:02 pmHelena

6h 55m

1 stop

SAN9:57 pmSan Diego

$315

Find similar

Alaska Airlines

Sep 19

SAN5:30 pmSan Diego

20h 51m

1 stop

HLN3:21 pmHelena

Sep 25

HLN4:02 pmHelena

7h 56m

1 stop

SAN10:58 pmSan Diego

$328

Find similar

Fly from

Fly to

Route

Depart

Return

Price

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Fri 9/19

3:45 pm-3:21 pm

1 stop22h 36m

Helena

Wed 9/24

4:02 pm-9:57 pm

1 stop6h 55m

$303

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Fri 9/19

1:55 pm-3:21 pm

2 stops24h 26m

Helena

Wed 9/24

4:02 pm-9:57 pm

1 stop6h 55m

$315

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Fri 9/19

5:30 pm-3:21 pm

1 stop20h 51m

Helena

Thu 9/25

4:02 pm-10:58 pm

1 stop7h 56m

$328

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Fri 9/19

10:18 pm-3:21 pm

2 stops16h 03m

Helena

Thu 9/25

4:02 pm-8:38 pm

1 stop5h 36m

$340

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Fri 9/19

8:59 pm-3:21 pm

2 stops17h 22m

Helena

Wed 9/24

4:02 pm-8:52 am

2 stops17h 50m

$341

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Fri 9/19

8:33 am-3:21 pm

2 stops29h 48m

Helena

Thu 9/25

4:02 pm-8:52 am

2 stops17h 50m

$351

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Fri 10/10

8:59 pm-5:41 pm

2 stops19h 42m

Helena

Mon 10/13

6:18 pm-2:17 pm

2 stops20h 59m

$378

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Fri 10/10

6:25 pm-5:41 pm

1 stop22h 16m

Helena

Sun 10/12

6:18 pm-11:05 pm

1 stop5h 47m

$388

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Mon 8/18

5:00 pm-10:13 pm

1 stop4h 13m

Helena

Sun 8/24

5:50 am-8:39 am

1 stop3h 49m

$518

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Mon 8/18

7:27 pm-4:04 pm

3 stops19h 37m

Helena

Sun 8/24

5:20 pm-8:16 pm

2 stops27h 56m

$691

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from San Diego to Helena

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest day to depart on your flight to Helena?

The cheapest day to depart from San Diego to Helena is on a Saturday. Travelers who choose to depart for Helena on a Saturday will often find tickets for as low as $378. The most expensive day to fly to Helena is Wednesday, with ticket prices averaging around $578.

What is the cheapest time of day to depart on your flight to Helena?

According to our data, the cheapest time of day to fly to Helena is in the morning. momondo users have found flights departing from San Diego to Helena in the morning for as low as $442. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Helena is in the afternoon when prices are around $464.

When to book flights from San Diego to Helena

Are you open to changing your travel dates? Check out the ideal times to fly from San Diego to Helena according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap San Diego to Helena (SAN to HLN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Diego to Helena

Best Price Found	$303
Fastest flight time	4h 13m
Direct flights	None
Airports in Helena	1 airport

The best flight deal from San Diego to Helena found on momondo in the last 72 hours is $303

The fastest flight from San Diego to Helena takes 4h 13m

There are no direct flights from San Diego to Helena. Popular non-direct route for this connection is San Diego Airport - Helena Airport.

There is 1 airport near Helena: Helena (HLN)

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How far is San Diego to Helena by plane?
San Diego and Helena are 995.5 mi apart from one another. In terms of flight time, this usually takes a little over 4h 13m.
When did momondo last update prices for flights from San Diego Airport to Helena Airport?
Prices for flights from San Diego Airport to Helena Airport are updated daily.
How many operators does momondo search for flights from San Diego Airport to Helena Airport?
As of August 2025, there is 1 operator available to choose from for flights from San Diego Airport to Helena Airport.
How old do you have to be to fly from San Diego Airport to Helena Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Diego Airport to Helena Airport.
What documentation or ID do you need to fly to Helena Airport?
The required travel and health documents for your Helena Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Helena Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from San Diego to Helena?
Based on momondo bookings for this flight route, the most popular airline on flight routes from San Diego to Helena is Delta (100% of total bookings).

Best airlines flying from San Diego to Helena

Compare and see reviews for airlines that fly from San Diego to Helena with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $219	Free Cancellation	Rating 8.0 7,983 reviews		Search Delta flights

Why use momondo?

Why should I use momondo to find a flight deal from San Diego to Helena?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from San Diego to Helena. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from San Diego to Helena with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Helena from San Diego with this policy.

How can momondo help me find flights from San Diego to Helena?

Once you have performed a search for San Diego to Helena flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from San Diego to Helena right now. Can momondo alert me if prices change?

If you are not ready to book a flight from San Diego to Helena now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Helena and let you know when they change.