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

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

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

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

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

Connecting flights from Helena to San Diego most commonly pass through: • Salt Lake City (SLC) - 79% of one-stop connections • Denver Intl (DEN) - 21% of one-stop connections Together, these airports account for 100% of one-stop bookings on this route.

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

Yes. Being flexible with your travel dates can save you up to 37% on the Helena to San Diego route. Monday is the cheapest departure day at $328 round-trip on average, while Sunday is the most expensive at $514, a difference of $186. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

What popular places can I visit in San Diego?

Some of the most popular sights in San Diego are Gaslamp Quarter, San Diego Convention Center and SeaWorld San Diego. These are among the most viewed places in San Diego on KAYAK.

How long is a flight from Helena to San Diego?

There are currently no nonstop flights available from Helena to San Diego. Flights with 1 layover take between 4h 59m and 7h 22m in total, depending on the connection.

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

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 Helena to San Diego 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 $323 to $1,166. That means the highest observed fare was about 4x higher than the lowest one.

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

One-way fares from Helena to San Diego are currently in line with typical prices for this route. Average one-way fares are about $392.

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

Flying via Salt Lake City (SLC) gives the shortest average 1-stop total travel time at 4h 59m, compared with 7h 22m via Denver Intl (DEN).

What is the time difference between Helena and San Diego?

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

What car rental options are available at San Diego Airport (SAN)?

San Diego Airport (SAN) hosts 5 major car rental companies, with daily rates starting from around $14 for economy cars. Top options include: · Dollar · Payless · Europcar · Thrifty · Fox

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

Round-trip flights from Helena to San Diego range from $375 to $498, with an average of $449 over the past 12 months. Anything below $375 counts as a good deal.

What is the cheapest airline to fly from Helena to San Diego?

Alaska Airlines ($323) and Delta ($585) are the cheapest airlines to fly round-trip from Helena to San Diego according to KAYAK data over the last 5 days.

What is the most popular layover airport when flying from Helena to San Diego?

Salt Lake City (SLC) is the most popular layover for the Helena to San Diego route. 79% of KAYAK users who booked 1-stop round-trips over the past 3 months connected via SLC.

What is the cheapest layover airport when flying from Helena to San Diego?

Flights via Denver Intl (DEN) offer the most affordable fares, with an average round-trip price of $377. Based on KAYAK data over the past 3 months.

When flying from Helena to San Diego which airport offers the shortest layover?

Salt Lake City (SLC) had the shortest average connection time for Helena to San Diego layovers at 189 minutes over the past 3 months.

$293 CHEAP FLIGHTS from Helena to San Diego (HLN - SAN)

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Filter searches by price, airline and more to find your best flights.

Cheapest round-trip

$323

Typical prices: $375-$498

Alaska Airlines

Wed 12/5Sun 12/9

HLN - SAN • 1 stop

Cheapest one-way

$293

Typical prices: $279-$393

Delta

Thu 9/20

HLN - SAN • 1 stop

When to travel

December

Cheapest • 27% price drop

March

Most popular

Good to know

Top layover airports

Denver Intl (DEN)

Cheapest • Avg $377 (round-trip)

Salt Lake City (SLC)

Shortest trip • 4h 59m (one-way)

Insights

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Flight Deals

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

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

Round-trip

One-way

Last minute

Recent round-trip flight deals from Helena to San Diego

Sat, Dec 5 - Wed, Dec 9

4:08 pm - 8:56 pmHLN Helena-SAN San Diego

5h 48m1 stop Seattle/Tacoma Intl

9:00 am - 3:31 pmSAN San Diego-HLN Helena

5h 31m1 stop Seattle/Tacoma Intl

$323Alaska Airlines

Sat, Dec 5 - Wed, Dec 9

4:08 pm - 8:56 pmHLN Helena-SAN San Diego

5h 48m1 stop Seattle/Tacoma Intl

9:00 am - 3:31 pmSAN San Diego-HLN Helena

5h 31m1 stop Seattle/Tacoma Intl

$363Alaska Airlines

Sat, Dec 5 - Wed, Dec 9

4:08 pm - 10:04 amHLN Helena-SAN San Diego

18h 56m2 stops Seattle/Tacoma Intl San Francisco

9:00 am - 3:31 pmSAN San Diego-HLN Helena

5h 31m1 stop Seattle/Tacoma Intl

$371Alaska Airlines

Sat, Dec 5 - Wed, Dec 9

4:08 pm - 8:56 pmHLN Helena-SAN San Diego

5h 48m1 stop Seattle/Tacoma Intl

6:15 am - 3:31 pmSAN San Diego-HLN Helena

8h 16m2 stops San Francisco Seattle/Tacoma Intl

$371Alaska Airlines

Wed, Nov 11 - Mon, Nov 16

4:41 pm - 10:35 pmHLN Helena-SAN San Diego

6h 54m1 stop Seattle/Tacoma Intl

9:30 pm - 4:04 pmSAN San Diego-HLN Helena

17h 34m2 stops Oakland Seattle/Tacoma Intl

$371Alaska Airlines

Sat, Dec 5 - Wed, Dec 9

4:08 pm - 8:56 pmHLN Helena-SAN San Diego

5h 48m1 stop Seattle/Tacoma Intl

9:00 am - 3:31 pmSAN San Diego-HLN Helena

5h 31m1 stop Seattle/Tacoma Intl

$373Alaska Airlines

Wed, Nov 11 - Mon, Nov 16

4:41 pm - 10:35 pmHLN Helena-SAN San Diego

6h 54m1 stop Seattle/Tacoma Intl

6:22 pm - 4:04 pmSAN San Diego-HLN Helena

20h 42m1 stop Seattle/Tacoma Intl

$373Alaska Airlines

Sat, Dec 5 - Wed, Dec 9

4:08 pm - 8:56 pmHLN Helena-SAN San Diego

5h 48m1 stop Seattle/Tacoma Intl

9:00 am - 3:31 pmSAN San Diego-HLN Helena

5h 31m1 stop Seattle/Tacoma Intl

$375Alaska Airlines

Fri, Sep 11 - Sun, Sep 13

7:15 am - 12:30 pmHLN Helena-SAN San Diego

6h 15m1 stop Salt Lake City

6:15 am - 12:17 pmSAN San Diego-HLN Helena

5h 02m1 stop Salt Lake City

$585Delta

Fri, Sep 11 - Sun, Sep 13

7:15 am - 3:01 pmHLN Helena-SAN San Diego

8h 46m2 stops Salt Lake City Los Angeles

6:15 am - 12:17 pmSAN San Diego-HLN Helena

5h 02m1 stop Salt Lake City

$590Delta

Booking Insights

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

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

Prices

Airlines

Layovers

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

Round-trip flights from Helena to San Diego start at $323. Prices are below average for this route right now, with typical round-trip fares ranging from $375 to $498. The lowest price found in the past 5 days was $323 on Alaska Airlines.

Find deals

Low season	June
High season	March
Cheapest flight	$293

Most popular time to fly and prices are also 13% lower on average.

Flight from Helena to San Diego

When to book flights from Helena to San Diego

Are your dates flexible? Find out the best times to travel from Helena to San Diego based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated round-trip price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

Which airports can I use when flying from Helena to San Diego?
Flights from Helena to San Diego usually depart from Helena (HLN) and arrive at San Diego (SAN).
What cabin classes can I book on flights from Helena to San Diego?
Only Economy Class is available on flights from Helena to San Diego.
Which airports do connecting flights from Helena to San Diego pass through?
Connecting flights from Helena to San Diego most commonly pass through:

• Salt Lake City (SLC) - 79% of one-stop connections
• Denver Intl (DEN) - 21% of one-stop connections
Together, these airports account for 100% of one-stop bookings on this route.
Can I save money by using flexible dates for flights from Helena to San Diego?
Yes. Being flexible with your travel dates can save you up to 37% on the Helena to San Diego route. Monday is the cheapest departure day at $328 round-trip on average, while Sunday is the most expensive at $514, a difference of $186. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.
What popular places can I visit in San Diego?
Some of the most popular sights in San Diego are Gaslamp Quarter, San Diego Convention Center and SeaWorld San Diego. These are among the most viewed places in San Diego on KAYAK.
How long is a flight from Helena to San Diego?
There are currently no nonstop flights available from Helena to San Diego. Flights with 1 layover take between 4h 59m and 7h 22m in total, depending on the connection.
Do I need a passport to fly from Helena to San Diego?
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 Helena to San Diego 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 $323 to $1,166. That means the highest observed fare was about 4x higher than the lowest one.
How are flight prices from Helena to San Diego looking right now?
One-way fares from Helena to San Diego are currently in line with typical prices for this route. Average one-way fares are about $392.
How much time can I save by choosing a different layover airport from Helena to San Diego?
Flying via Salt Lake City (SLC) gives the shortest average 1-stop total travel time at 4h 59m, compared with 7h 22m via Denver Intl (DEN).
What is the time difference between Helena and San Diego?
San Diego is 1 hour behind Helena (Pacific Time vs Mountain Time). Plan for the time shift when scheduling connections or first-day activities.
What car rental options are available at San Diego Airport (SAN)?
San Diego Airport (SAN) hosts 5 major car rental companies, with daily rates starting from around $14 for economy cars. Top options include:
· Dollar
· Payless
· Europcar
· Thrifty
· Fox
How much should I expect to pay for a Helena to San Diego flight?
Round-trip flights from Helena to San Diego range from $375 to $498, with an average of $449 over the past 12 months. Anything below $375 counts as a good deal.

If your dates can be flexible, aim for a Monday departure instead of Sunday. On this route, Monday flights average $328 - about $186 less than Sunday (36% savings) based on the last 12 months.
If you can choose when to travel, plan your Helena to San Diego trip for December. Fares historically average $328 round-trip in that month - typically $347 less than the most expensive month, which is May (based on the last 12 months).
If you're arriving late at night and need somewhere to stay, check out these hotels close to San Diego Airport.
- Courtyard by Marriott San Diego Downtown Little Italy
- Bay Club Hotel & Marina
- Best Western Plus Bayside Inn

Everything you need to know for your flight from Helena to San Diego

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Helena (HLN)

San Diego (SAN)

HLN - SAN

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

Everything you should know

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

Recent round-trip flight deals from Helena to San Diego

Recent one-way flight deals from Helena to San Diego

Recent last minute flight deals from Helena to San Diego

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

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

What is the cheapest airline to fly from Helena to San Diego?

What is the most popular layover airport when flying from Helena to San Diego?

What is the cheapest layover airport when flying from Helena to San Diego?

When flying from Helena to San Diego which airport offers the shortest layover?

Key details for Helena to San Diego flights

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When to book flights from Helena to San Diego

Your Helena to San Diego flight questions, answered

Your guide to booking Helena to San Diego flights

Everything you need to know for your flight from Helena to San Diego

Information on your arrival and departure airports

Cabin class types available on flights from Helena to San Diego

Complete your trip to San Diego with a hotel stay or car rental

Find direct flights to and from Helena and San Diego

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Flights from domestic origins to San Diego

Choose which airport to fly into in San Diego

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