Cheap flights from Helena to San Diego from $207
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Helena to San Diego departing on 12/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Fly from
Fly to
Route
Depart
Return
HelenaSan Diego
HLN Helena - SAN San Diego
HLNSAN
Helena
Sat 1/23
5:00 pm-9:16 am
1 stop17h 16m
San Diego
Sat 1/30
6:16 am-4:23 pm
1 stop9h 07m
HelenaSan Diego
HLN Helena - SAN San Diego
HLNSAN
Helena
Sat 12/5
4:49 pm-9:17 pm
1 stop5h 28m
San Diego
Wed 12/9
6:15 am-4:12 pm
1 stop8h 57m
HelenaSan Diego
HLN Helena - SAN San Diego
HLNSAN
Helena
Sat 12/5
4:49 pm-9:17 pm
1 stop5h 28m
San Diego
Wed 12/9
6:15 am-4:12 pm
1 stop8h 57m
HelenaSan Diego
HLN Helena - SAN San Diego
HLNSAN
Helena
Sat 12/5
4:49 pm-9:17 pm
1 stop5h 28m
San Diego
Wed 12/9
7:12 am-4:12 pm
2 stops8h 00m
HelenaSan Diego
HLN Helena - SAN San Diego
HLNSAN
Helena
Sat 12/5
4:49 pm-9:17 pm
1 stop5h 28m
San Diego
Wed 12/9
6:15 am-4:12 pm
1 stop8h 57m
HelenaSan Diego
HLN Helena - SAN San Diego
HLNSAN
Helena
Sat 12/5
4:49 pm-9:17 pm
1 stop5h 28m
San Diego
Wed 12/9
6:15 am-4:12 pm
1 stop8h 57m
HelenaSan Diego
HLN Helena - SAN San Diego
HLNSAN
Helena
Sat 1/23
5:00 pm-9:16 am
1 stop17h 16m
San Diego
Sat 1/30
4:16 pm-4:23 pm
2 stops23h 07m
HelenaSan Diego
HLN Helena - SAN San Diego
HLNSAN
Helena
Sat 12/5
4:49 pm-4:40 pm
2 stops24h 51m
San Diego
Wed 12/9
6:15 am-4:12 pm
1 stop8h 57m
HelenaSan Diego
HLN Helena - SAN San Diego
HLNSAN
Helena
Mon 3/29
12:50 pm-6:46 pm
1 stop6h 56m
San Diego
Tue 3/30
5:00 pm-10:41 pm
1 stop4h 41m
HelenaSan Diego
HLN Helena - SAN San Diego
HLNSAN
Helena
Mon 3/29
12:50 pm-6:55 pm
2 stops7h 05m
San Diego
Tue 3/30
6:15 am-12:24 pm
1 stop5h 09m
See travel insights to San Diego from
How to get the cheapest flight ticket from Helena to San Diego
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 airline that flies from Helena to San Diego?
Alaska Airlines and Delta are the most popular carriers operating from Helena to San Diego
What airlines fly to San Diego?
Delta, Alaska Airlines and United Airlines are the top three most popular airlines that fly to San Diego from Helena 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 San Diego. Keep in mind that there are 5 different airlines that fly to San Diego on a routine basis, so you have a few additional options to choose from.
When to book flights from Helena to San Diego
Cheap Helena to San Diego (HLN to SAN) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Helena to San Diego
Frequently asked questions about flying from Helena to San Diego
How far is Helena to San Diego by plane?
The distance between Helena and San Diego is about 995.5 mi. A reasonable flight in good conditions will take 4h 16m.
When did momondo last update prices for flights from Helena Airport to San Diego Airport?
Prices for flights from Helena Airport to San Diego Airport were last updated today.
How many operators does momondo search for flights from Helena Airport to San Diego Airport?
The number of operators available for flights from Helena Airport to San Diego Airport is 1 as of October 2026.
How old do you have to be to fly from Helena Airport to San Diego 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 Helena Airport to San Diego Airport.
What documentation or ID do you need to fly to San Diego Airport?
The necessary travel and health documents for your San Diego Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Helena to San Diego?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Helena to San Diego is Delta (100% of total bookings).
Best airlines flying from Helena to San Diego
Compare and see reviews for airlines that fly from Helena to San Diego with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $257 | Free Cancellation | Rating 7.8 8,654 reviews |
Traveling to a place near San Diego?
Book flights to San Diego if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Helena to San Diego?
It is quick and easy to find Helena to San Diego flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to San Diego that suits you.
Can I find flights from Helena to San Diego with flexible booking policies on momondo?
Flights from Helena to San Diego with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from Helena to San Diego?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Helena to San Diego.
I’m not ready to book a flight from Helena to San Diego right now. Can momondo alert me if prices change?
If you are not ready to book a flight from Helena to San Diego now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to San Diego and let you know when they change.