Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from San Diego to Helena from $284

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from San Diego to Helena departing on 1/31. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from San Diego to Helena

Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
6:15 am - 6:11 pm
SAN
-
HLN
10h 56m1 stop
Alaska Airlines Logo
6:48 pm - 10:07 am
HLN
-
SAN
16h 19m1 stop
$284Alaska Airlines
Sat, Jan 31 - Tue, Feb 3
Delta Logo
6:15 am - 12:25 pm
SAN
-
HLN
5h 10m1 stop
Delta Logo
1:05 pm - 10:04 am
HLN
-
SAN
21h 59m2 stops
$297Delta
Tue, Feb 17 - Wed, Feb 25
Delta Logo
6:15 am - 12:25 pm
SAN
-
HLN
5h 10m1 stop
Delta Logo
1:05 pm - 10:04 am
HLN
-
SAN
21h 59m2 stops
$307Delta
Tue, Feb 17 - Fri, Feb 27
United Airlines Logo
6:30 am - 1:40 pm
SAN
-
HLN
6h 10m1 stop
United Airlines Logo
6:15 am - 12:57 pm
HLN
-
SAN
7h 42m1 stop
$309United Airlines
Tue, Feb 17 - Sat, Feb 28
Alaska Airlines Logo
9:37 am - 6:11 pm
SAN
-
HLN
7h 34m1 stop
Alaska Airlines Logo
6:48 pm - 10:55 am
HLN
-
SAN
17h 07m2 stops
$312Alaska Airlines
Sat, Jan 31 - Tue, Feb 3
Delta Logo
6:15 am - 12:25 pm
SAN
-
HLN
5h 10m1 stop
Delta Logo
1:05 pm - 10:20 pm
HLN
-
SAN
10h 15m2 stops
$317Delta
Tue, Feb 17 - Tue, Mar 3
Delta Logo
6:15 am - 12:25 pm
SAN
-
HLN
5h 10m1 stop
Delta Logo
5:30 am - 8:48 am
HLN
-
SAN
4h 18m1 stop
$319Delta
Tue, Feb 17 - Sun, Mar 1
Alaska Airlines Logo
8:59 pm - 3:59 pm
SAN
-
HLN
18h 00m2 stops
Alaska Airlines Logo
4:36 pm - 2:49 pm
HLN
-
SAN
23h 13m2 stops
$320Alaska Airlines
Tue, Feb 17 - Fri, Feb 27
Delta Logo
6:15 am - 12:25 pm
SAN
-
HLN
5h 10m1 stop
Delta Logo
1:05 pm - 10:04 am
HLN
-
SAN
21h 59m2 stops
$327Delta
Tue, Feb 17 - Sun, Mar 1
Alaska Airlines Logo
4:47 pm - 3:59 pm
SAN
-
HLN
22h 12m2 stops
Alaska Airlines Logo
4:36 pm - 11:38 am
HLN
-
SAN
20h 02m2 stops
$333Alaska Airlines
Tue, Feb 17 - Thu, Feb 26

Alaska Airlines flights from San Diego to Helena

Our best Alaska Airlines deals on San Diego to Helena flight tickets
Alaska Airlines
Jan 31
SAN6:15 amSan Diego
10h 56m
1 stop
HLN6:11 pmHelena
Feb 3
HLN6:48 pmHelena
16h 19m
1 stop
SAN10:07 amSan Diego
$264
Find similar
Alaska Airlines
Jan 31
SAN6:15 amSan Diego
10h 56m
1 stop
HLN6:11 pmHelena
Feb 3
HLN6:48 pmHelena
16h 19m
1 stop
SAN10:07 amSan Diego
$284
Find similar
Alaska Airlines
Jan 31
SAN6:15 amSan Diego
10h 56m
1 stop
HLN6:11 pmHelena
Feb 3
HLN6:48 pmHelena
21h 33m
2 stops
SAN3:21 pmSan Diego
$303
Find similar

Delta flights from San Diego to Helena

Our best Delta deals on San Diego to Helena flight tickets
Delta
Feb 17
SAN6:15 amSan Diego
5h 10m
1 stop
HLN12:25 pmHelena
Feb 25
HLN1:05 pmHelena
21h 59m
2 stops
SAN10:04 amSan Diego
$297
Find similar
Delta
Feb 17
SAN6:15 amSan Diego
5h 10m
1 stop
HLN12:25 pmHelena
Feb 26
HLN1:05 pmHelena
21h 59m
2 stops
SAN10:04 amSan Diego
$307
Find similar
Delta
Feb 17
SAN6:15 amSan Diego
5h 10m
1 stop
HLN12:25 pmHelena
Feb 25
HLN5:30 amHelena
4h 15m
1 stop
SAN8:45 amSan Diego
$309
Find similar

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 December 16, 2025.
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

Sat 1/31

6:15 am-6:11 pm

1 stop10h 56m

Helena

Tue 2/3

6:48 pm-10:07 am

1 stop16h 19m

$284

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Tue 2/17

6:15 am-12:25 pm

1 stop5h 10m

Helena

Wed 2/25

1:05 pm-10:04 am

2 stops21h 59m

$297

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Tue 2/17

6:15 am-12:25 pm

1 stop5h 10m

Helena

Fri 2/27

1:05 pm-10:04 am

2 stops21h 59m

$307

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Tue 2/17

6:30 am-1:40 pm

1 stop6h 10m

Helena

Sat 2/28

6:15 am-12:57 pm

1 stop7h 42m

$309

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Sat 1/31

9:37 am-6:11 pm

1 stop7h 34m

Helena

Tue 2/3

6:48 pm-10:55 am

2 stops17h 07m

$312

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Tue 2/17

6:15 am-12:25 pm

1 stop5h 10m

Helena

Tue 3/3

1:05 pm-10:20 pm

2 stops10h 15m

$317

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Tue 2/17

6:15 am-12:25 pm

1 stop5h 10m

Helena

Sun 3/1

5:30 am-8:48 am

1 stop4h 18m

$319

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Tue 2/17

8:59 pm-3:59 pm

2 stops18h 00m

Helena

Fri 2/27

4:36 pm-2:49 pm

2 stops23h 13m

$320

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Tue 2/17

6:15 am-12:25 pm

1 stop5h 10m

Helena

Sun 3/1

1:05 pm-10:04 am

2 stops21h 59m

$327

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Tue 2/17

4:47 pm-3:59 pm

2 stops22h 12m

Helena

Thu 2/26

4:36 pm-11:38 am

2 stops20h 02m

$333

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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

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.

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

You could potentially save up to 31% 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

5h 10m

Direct flights

None
The fastest flight from San Diego to Helena takes 5h 10m
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 5h 10m.

  • 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 $219Free CancellationRating
7.9
8,008 reviews
Search Delta flights
Alaska AirlinesPriceFrom $312Free CancellationRating
8.0
11,465 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.

An easier way to manage your Helena trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Thu 1/15
Thu 1/22
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States