HLN - SAN

$175 Find Cheap Flights from Helena to San Diego

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Helena to San Diego departing on 11/23. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to San Diego

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Helena to San Diego, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Helena to San Diego, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$245
Typical prices: $348-$418
Hawaiian Airlines
Sat 2/28Tue 3/3
HLN - SAN • 1 stop
Cheapest one-way
$175
Delta
Sun 11/23
HLN - SAN • 1 stop
Top airlines
Hawaiian Airlines
Cheapest • from $245 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Helena to San Diego that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Helena to San Diego

Sat, Feb 28 - Tue, Mar 3
Hawaiian Airlines Logo
4:10 pm - 12:07 amHLN-SAN
8h 57m1 stop
Hawaiian Airlines Logo
7:00 am - 3:43 pmSAN-HLN
7h 43m1 stop
$245Hawaiian Airlines
Find Deal
Sat, Feb 28 - Tue, Mar 3
Delta Logo
12:50 pm - 10:47 pmHLN-SAN
10h 57m2 stops
Delta Logo
11:05 am - 10:38 pmSAN-HLN
10h 33m2 stops
$256Delta
Find Deal
Sat, Feb 28 - Tue, Mar 3
Delta Logo
12:50 pm - 10:47 pmHLN-SAN
10h 57m2 stops
Delta Logo
11:05 am - 10:38 pmSAN-HLN
10h 33m2 stops
$266Delta
Find Deal
Sat, Feb 28 - Tue, Mar 3
Delta Logo
12:50 pm - 4:12 pmHLN-SAN
4h 22m1 stop
Delta Logo
6:15 am - 10:38 pmSAN-HLN
15h 23m2 stops
$287Delta
Find Deal
Sat, Feb 28 - Tue, Mar 3
Alaska Airlines Logo
4:10 pm - 9:50 amHLN-SAN
18h 40m2 stops
Alaska Airlines Logo
11:30 am - 3:43 pmSAN-HLN
27h 13m1 stop
$292Alaska Airlines
Find Deal
Fri, Nov 14 - Mon, Nov 24
United Airlines Logo
6:40 am - 1:04 pmHLN-SAN
7h 24m1 stop
United Airlines Logo
12:43 pm - 9:22 pmSAN-HLN
7h 39m1 stop
$380United Airlines
Find Deal
Fri, Nov 14 - Mon, Nov 24
Alaska Airlines Logo
6:13 pm - 9:58 amHLN-SAN
16h 45m2 stops
Alaska Airlines Logo
6:15 am - 6:52 pmSAN-HLN
11h 37m1 stop
$383Alaska Airlines
Find Deal
Sat, Mar 21 - Sat, Mar 28
United Airlines Logo
2:30 pm - 8:51 pmHLN-SAN
7h 21m1 stop
United Airlines Logo
6:55 pm - 8:59 pmSAN-HLN
25h 04m1 stop
$562United Airlines
Find Deal
Sat, Dec 27 - Thu, Jan 1
Multiple Airlines Logo
6:32 pm - 11:45 amHLN-SAN
42h 13m2 stops
Multiple Airlines Logo
9:41 am - 5:55 pmSAN-HLN
7h 14m1 stop
$1,014Multiple Airlines
Find Deal
Sat, Dec 27 - Sun, Jan 4
Multiple Airlines Logo
6:32 pm - 11:45 amHLN-SAN
42h 13m2 stops
Multiple Airlines Logo
9:41 am - 5:55 pmSAN-HLN
7h 14m1 stop
$1,104Multiple Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for Helena to San Diego flights

Get data-powered insights and trends into flights from Helena to San Diego to help you find the cheapest flights, the best time to fly and much more.

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

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Helena to San Diego departing in February.

What’s the cheapest day of the week to fly from Helena to San Diego?

The average price of all round-trip flights from Helena to San Diego clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to San Diego on a Wednesday and more expensive on a Monday. On your return trip to Helena, you should consider flying back on a Saturday, and avoid Wednesdays for better deals.

Good to know

Low seasonNovember
Cheapest flight$175
Best time to beat the crowds with an average 58% drop in price.
Most popular time to fly and prices are also 28% 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.

FAQs for booking flights from Helena to San Diego

  • What is the cheapest flight from Helena to San Diego?

    In the last 3 days, the lowest price for a flight from Helena to San Diego was $175 for a one-way ticket and $245 for a round-trip.

  • Do I need a passport to fly between Helena and San Diego?

    No, a passport isn't needed to fly from Helena to San Diego. However, local authorities might ask for an official ID.

  • Which airports will I be using when flying from Helena to San Diego?

    Helena and San Diego are both served by 1 main airport. You will leave Helena from Helena and will be arriving at San Diego.

  • Which aircraft models fly most regularly from Helena to San Diego?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Helena to San Diego?

    SkyTeam is the only airline alliance operating flights between Helena and San Diego.

  • How does KAYAK find such low prices on flights from Helena to San Diego?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Helena to San Diego.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Helena to San Diego?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Diego from Helena is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Helena to San Diego?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Diego with an airline and back to Helena with another airline. Booking your flights between Helena and SAN can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Helena to San Diego?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Diego from Helena up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Helena to San Diego

 
See real verified KAYAK customer reviews for airlines flying from Helena to San Diego. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Helena to San Diego? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 7984 reviews
7.9Comfort
7.9Entertainment
8.2Boarding
7.3Food
8.5Crew
Airline reviews

They changed planes and the new plane couldn’t carry enough fuel to fly across the country so we had to stop in Kansas City to refuel. Flight was delayed .

2.0 MediocreLeslie, Oct 2025BOS - SFO
Read more Delta reviews

They changed planes and the new plane couldn’t carry enough fuel to fly across the country so we had to stop in Kansas City to refuel. Flight was delayed .

Flight was too crowded and seats are too small, especially since passengrs are getting larger. Having a middle seat is ALWAYS tough! Woman on my left was large & kept creeping in to my space. Flight personnel were great! Have more savory rather than sweet snacks please.

The crew took good care of us. The flight from ATL to SFO is a longer one, and there were multiple beverage offerings. I like the 757's that Delta uses. Good airplane that is comfortable. I do wish Delta would separate Priority boarding from the better seats. I would gladly take a smaller seat in an open row than be jammed into Comfort just to get priority boarding, just to make sure I don't have to check a bag.

Gate agent rushed to fill hot jetway with crowd so it took over 12 minutes to go from gate to plane. Just like a discount airline Pooly prepared cabin and third time that claim of rough air prevented any cabin service. Friends on a Southwest flight at similar time had service.

I was uncomfortably cold on the plane. Other than that it was uneventful and therefore as enjoyable as a plane ride can be.

Food was surprisingly good but the WiFi was not great

My flight was extremely cold. I had a jacket and a cover was left in each seat. The cover was extremely thin and I have a disability, fibromyalgia and arthrithis and AC air is the worst. I closed my vent and my husbands vent and it still was frigid. I asked the attendant if I could get another cover and she quickly almost dismissively and totally unconcerned stating, (I quote) (one per chair) and walked off so quickly that I didn't get a chance to explain to her that I literally have adisability. I didnt want to make a seen so I set on that flight for over 5 hours in pain, joints locking up and extremely uncomfortable. When my fibromyalgia flares up my joints not only ache but they will lock up also and it takes me days to get back to my regular self even though I take medication for it. I felt like it would not have hurt anyone at all for her to just give me an extra cover because I'm sure they have all types of medical issues in people that fly every day.

Not a "Delta" issue, but a JFK issue: We booked a connecting flight with 3 1/2 hours between to clearn immigration and customs. Our inbound flight (BCN to JFK) was on the taxiway 45 minutes which ate into our layover time. Immigtration was insanely quick with the CBP MPC app; however, clearing TSA (again, after we were ALREADY cleared in Spain on the inbound international flight) took over 95 minutes. This left us with 10 minutes before boarding the connecting flight (JFK to SAN) to walk to the far end of Terminal 4 and try to find food. We didn't find any food that could promise to serve us in under 10 minutes so we boarded the Delta flight after coming off a plance and an 8-hour flight knowing that we wouldn't be served any food on the next 5 1/2 hour flight. I feel like Delta needs to put pressure on the JFK TSA to open more screening stations (by our count, we saw only 5 scanners open and a line of - as we said - over 90 minutes. The insult is that we WERE ALREADY SCREENED through TSA, but as you come off one flight into the USA, you have to go through the whole process again. It seems like if you have a connecting flight, there should be a way to pass through immigration and customs without needing to return through TSA.

There are 4 flights in consecutive gates with about the same departure time. Two flights were boarding at the same time. One was delayed or boarding would be happening at the same time. I am not sure what Delta and LAX need to do to have a better layout at the end of Terminal 2

5 hours of delay that could've been much shorter if Delta had taken the 1 hour delay they imposed on the flight before boarding to run any of the plane checks required for flight to find the hydraulic issue that required nearly 3 hours to fix. $24 of meal credit buys a sandwich and a soft drink. Poor communication within the terminal about what gate we'd be re-boarding from and when we'd be re-boarding.

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

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