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Cheap flights from San Diego to Helena from $109

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Diego to Helena departing on 3/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from San Diego to Helena

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
6:15 am - 3:59 pm
SAN
-
HLN
8h 44m
1 stop
Multiple Airlines Logo
6:22 pm - 11:58 pm
HLN
-
SAN
6h 36m
1 stop
$330Multiple Airlines
Fri, Mar 13 - Fri, Mar 20
Alaska Airlines Logo
7:35 pm - 5:45 pm
SAN
-
HLN
21h 10m
1 stop
Alaska Airlines Logo
6:22 pm - 4:25 pm
HLN
-
SAN
23h 03m
2 stops
$335Alaska Airlines
Thu, Apr 2 - Mon, Apr 6
Alaska Airlines Logo
10:48 am - 5:45 pm
SAN
-
HLN
5h 57m
1 stop
Alaska Airlines Logo
6:22 pm - 7:56 am
HLN
-
SAN
14h 34m
2 stops
$341Alaska Airlines
Wed, Apr 1 - Sat, Apr 4
Alaska Airlines Logo
10:03 pm - 5:45 pm
SAN
-
HLN
18h 42m
2 stops
Alaska Airlines Logo
6:22 pm - 7:56 am
HLN
-
SAN
14h 34m
2 stops
$344Alaska Airlines
Wed, Apr 1 - Sat, Apr 4
Alaska Airlines Logo
8:05 pm - 5:45 pm
SAN
-
HLN
20h 40m
2 stops
Alaska Airlines Logo
6:22 pm - 2:52 pm
HLN
-
SAN
21h 30m
2 stops
$345Alaska Airlines
Thu, Apr 2 - Mon, Apr 6
Alaska Airlines Logo
8:05 pm - 5:45 pm
SAN
-
HLN
20h 40m
2 stops
Alaska Airlines Logo
6:22 pm - 7:56 am
HLN
-
SAN
14h 34m
2 stops
$353Alaska Airlines
Mon, Mar 30 - Fri, Apr 3
Alaska Airlines Logo
8:39 am - 3:59 pm
SAN
-
HLN
6h 20m
1 stop
Alaska Airlines Logo
6:22 pm - 9:19 am
HLN
-
SAN
15h 57m
2 stops
$362Alaska Airlines
Fri, Mar 13 - Fri, Mar 20
Alaska Airlines Logo
6:15 am - 5:45 pm
SAN
-
HLN
10h 30m
1 stop
Alaska Airlines Logo
6:22 pm - 11:58 pm
HLN
-
SAN
6h 36m
1 stop
$363Alaska Airlines
Thu, Apr 2 - Mon, Apr 6
Alaska Airlines Logo
8:43 pm - 5:45 pm
SAN
-
HLN
20h 02m
1 stop
Alaska Airlines Logo
6:22 pm - 4:56 pm
HLN
-
SAN
23h 34m
1 stop
$368Alaska Airlines
Fri, Mar 27 - Wed, Apr 1
Alaska Airlines Logo
8:43 pm - 5:45 pm
SAN
-
HLN
20h 02m
1 stop
Alaska Airlines Logo
6:22 pm - 7:45 am
HLN
-
SAN
14h 23m
2 stops
$377Alaska Airlines
Mon, Mar 30 - Wed, Apr 1

Delta flights from San Diego to Helena

Our best Delta deals on San Diego to Helena flight tickets
Delta
Mar 31
SAN6:15 amSan Diego
5h 06m
1 stop
HLN12:21 pmHelena
Apr 1
HLN5:30 amHelena
4h 15m
1 stop
SAN8:45 amSan Diego
$389
Delta
Mar 31
SAN5:01 pmSan Diego
18h 20m
1 stop
HLN12:21 pmHelena
Apr 5
HLN5:30 amHelena
4h 15m
1 stop
SAN8:45 amSan Diego
$407
Delta
Mar 31
SAN6:15 amSan Diego
5h 06m
1 stop
HLN12:21 pmHelena
Apr 2
HLN1:02 pmHelena
6h 33m
1 stop
SAN6:35 pmSan Diego
$409

Alaska Airlines flights from San Diego to Helena

Our best Alaska Airlines deals on San Diego to Helena flight tickets
Alaska Airlines
Apr 2
SAN7:35 pmSan Diego
21h 10m
1 stop
HLN5:45 pmHelena
Apr 6
HLN6:22 pmHelena
23h 03m
2 stops
SAN4:25 pmSan Diego
$335
Alaska Airlines
Apr 1
SAN10:48 amSan Diego
5h 57m
1 stop
HLN5:45 pmHelena
Apr 4
HLN6:22 pmHelena
14h 34m
2 stops
SAN7:56 amSan Diego
$341
Alaska Airlines
Apr 1
SAN10:03 pmSan Diego
18h 42m
2 stops
HLN5:45 pmHelena
Apr 4
HLN6:22 pmHelena
14h 34m
2 stops
SAN7:56 amSan Diego
$344

momondo Fare Finder

 
Customize your flight search to find flights from San Diego to Helena that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated January 29, 2026.
Use the filters below to find and compare flights from San Diego to Helena that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Fri 3/13

6:15 am-3:59 pm

1 stop8h 44m

Helena

Fri 3/20

6:22 pm-11:58 pm

1 stop6h 36m

$330

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Thu 4/2

7:35 pm-5:45 pm

1 stop21h 10m

Helena

Mon 4/6

6:22 pm-4:25 pm

2 stops23h 03m

$335

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Wed 4/1

10:48 am-5:45 pm

1 stop5h 57m

Helena

Sat 4/4

6:22 pm-7:56 am

2 stops14h 34m

$341

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Wed 4/1

10:03 pm-5:45 pm

2 stops18h 42m

Helena

Sat 4/4

6:22 pm-7:56 am

2 stops14h 34m

$344

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Thu 4/2

8:05 pm-5:45 pm

2 stops20h 40m

Helena

Mon 4/6

6:22 pm-2:52 pm

2 stops21h 30m

$345

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Mon 3/30

8:05 pm-5:45 pm

2 stops20h 40m

Helena

Fri 4/3

6:22 pm-7:56 am

2 stops14h 34m

$353

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Fri 3/13

8:39 am-3:59 pm

1 stop6h 20m

Helena

Fri 3/20

6:22 pm-9:19 am

2 stops15h 57m

$362

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Thu 4/2

6:15 am-5:45 pm

1 stop10h 30m

Helena

Mon 4/6

6:22 pm-11:58 pm

1 stop6h 36m

$363

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Fri 3/27

8:43 pm-5:45 pm

1 stop20h 02m

Helena

Wed 4/1

6:22 pm-4:56 pm

1 stop23h 34m

$368

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Mon 3/30

8:43 pm-5:45 pm

1 stop20h 02m

Helena

Wed 4/1

6:22 pm-7:45 am

2 stops14h 23m

$377

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first
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See travel insights to Helena from

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

Can stopping save me money on San Diego to Helena flights?

You could potentially save up to 43% on your flight if you consider stops on a San Diego to Helena flight.

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

Fastest flight time

4h 34m

Direct flights

None
The fastest flight from San Diego to Helena takes 4h 34m
There are no direct flights from San Diego to Helena. There are no popular flight routes from San Diego to Helena.
Search flight deals

  • 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 34m.

  • 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?

  • 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?

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
DeltaPriceFrom $158Free CancellationRating
7.9
8,127 reviews
Search Delta flights
Alaska AirlinesPriceFrom $312Free CancellationRating
8.0
11,807 reviews
Search Alaska Airlines 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.

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