Frontier flights to San Diego (SAN) from $58 | KAYAK

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Cheap Frontier Flight Deals to San Diego

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

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One-way

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Recent round-trip Frontier flight deals to San Diego

Mon, Aug 24 - Thu, Aug 27

1:07 pm - 2:50 pmSFO San Francisco-SAN San Diego

1h 43mnonstop

10:00 am - 11:52 amSAN San Diego-SFO San Francisco

1h 52mnonstop

$76Frontier

Fri, Sep 25 - Thu, Oct 8

4:31 pm - 6:19 pmSFO San Francisco-SAN San Diego

1h 48mnonstop

4:36 pm - 6:22 pmSAN San Diego-SFO San Francisco

1h 46mnonstop

$78Frontier

Sun, Oct 18 - Wed, Oct 21

5:52 pm - 7:37 pmSFO San Francisco-SAN San Diego

1h 45mnonstop

4:36 pm - 6:22 pmSAN San Diego-SFO San Francisco

1h 46mnonstop

$79Frontier

Thu, Nov 5 - Sat, Nov 7

5:52 pm - 7:37 pmSFO San Francisco-SAN San Diego

1h 45mnonstop

4:36 pm - 6:22 pmSAN San Diego-SFO San Francisco

1h 46mnonstop

$81Frontier

Fri, Oct 16 - Thu, Oct 29

5:52 pm - 7:37 pmSFO San Francisco-SAN San Diego

1h 45mnonstop

4:36 pm - 6:22 pmSAN San Diego-SFO San Francisco

1h 46mnonstop

$82Frontier

Thu, Nov 5 - Sat, Nov 7

5:52 pm - 7:37 pmSFO San Francisco-SAN San Diego

1h 45mnonstop

4:36 pm - 6:22 pmSAN San Diego-SFO San Francisco

1h 46mnonstop

$83Frontier

Sat, Sep 5 - Tue, Sep 8

1:07 pm - 2:50 pmSFO San Francisco-SAN San Diego

1h 43mnonstop

10:00 am - 11:52 amSAN San Diego-SFO San Francisco

1h 52mnonstop

$84Frontier

Thu, Aug 27 - Mon, Aug 31

1:07 pm - 2:50 pmSFO San Francisco-SAN San Diego

1h 43mnonstop

8:59 pm - 10:25 amSAN San Diego-SFO San Francisco

13h 26m1 stop Las Vegas Harry Reid Intl

$86Frontier

Mon, Aug 17 - Tue, Aug 18

10:23 pm - 11:59 pmSFO San Francisco-SAN San Diego

1h 36mnonstop

10:00 am - 11:52 amSAN San Diego-SFO San Francisco

1h 52mnonstop

$87Frontier

Thu, Aug 27 - Mon, Aug 31

1:07 pm - 2:50 pmSFO San Francisco-SAN San Diego

1h 43mnonstop

8:59 pm - 10:25 amSAN San Diego-SFO San Francisco

13h 26m1 stop Las Vegas Harry Reid Intl

$88Frontier

Useful Info

KAYAK's insights & trends for San Diego flights with Frontier

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

What is the cheapest month to fly with Frontier to San Diego?

The cheapest month for Frontier flights to San Diego is February, where tickets cost $104 (return) on average. On the other hand, the most expensive months to fly this route on Frontier are June and July, where the average cost of round-trip tickets is $224 and $206 respectively.

How far in advance should I book Frontier flights to San Diego?

For the absolute cheapest price on Frontier, our data suggests you should book 4 weeks before departure.

What is the cheapest flight to San Diego with Frontier?

The cheapest airline ticket to San Diego from the United States with Frontier in the last 5 days was $58 one-way, and $76 round-trip on the route from San Francisco to San Diego. The most popular route is from Denver to San Diego and the cheapest ticket found on this route in the last 5 days was $112 return.

How many direct flights does Frontier operate to San Diego every week?

Each week there are around 63 direct flights from within the United States to San Diego. The most common day for departures is Monday, with 16% of flights taking off on this day.

What is the cheapest day to fly to San Diego?

Based on KAYAK data, the cheapest day to fly to San Diego is Saturday where tickets can be as cheap as $151. On the other hand, the most expensive day to fly is Sunday, where prices are $192 on average.

What is the cheapest time of day to fly to San Diego with Frontier?

The cheapest time of day to fly to San Diego with Frontier is generally in the morning, when flights cost $147 on average.

Low season	February
High season	August
Cheapest flight	$58
Average price round-trip	$243

Best time to beat the crowds with an average 13% drop in price.

Most popular time to fly with an average 10% increase in price.

Flight from San Francisco to San Diego

(price for this month)

When to book flights with Frontier to San Diego

Average price per month

Flight prices as travel date approaches

Is Frontier cheaper than other airlines flying to San Diego?
Frontier is the cheapest airline flying to San Diego with an average return price of $256. Flights to San Diego with Alaska Airlines cost $360 on average, while United Airlines cost $375.
Which other airlines fly to San Diego?
Along with Frontier, you can also fly to San Diego with Southwest, Delta, American Airlines, Breeze Airways, Alaska Airlines, JetBlue, Alaska Airlines, Sun Country Air, United Airlines and Breeze Airways.
How much is a flight to San Diego with Frontier?
On average, Frontier flights to San Diego cost $256 for a round-trip.
Which airport do Frontier flights to San Diego fly into?
You’ll fly into San Diego Airport when flying to San Diego with Frontier.

The cheapest flight to San Diego with Frontier found on KAYAK in the last 2 weeks departed from Phoenix Sky Harbor Intl Airport and cost $46.
If you’re intending to fly with Frontier, book your flight to San Diego at least 2 weeks before departure to ensure a below-average price.
High season for flights to San Diego with Frontier is October and prices are highest at this time. The cheapest month to fly is February.

5.6

Fair2,722 verified ratings

5.4Comfort

6.6Crew

5.9Boarding

4.3Entertainment

4.5Food

G

2.0 Poor

Gregory, Aug 2026

See my last review

G

4.0 Mediocre

Gregory, Aug 2026

I know Frontier is a “no-frills” airline. I understand the concept. However, I jumped on some tickets for our family vacation, expecting to play a bit of a game to figure out the family bags and not over spend. In the end, I got the short end of this deal by far. 1. I did not expect them to charge the baggage fee for each direction. It makes the fee look high-ish at a glance, but reasonable. Then when you get to checkout and realize you have to pay it twice to come home with your luggage, it becomes ridiculous. 2. The low checked bag weight limit. I am used to packing a 50lb bag with my preferred airline. Frontier’s artificially low 40lb limit more quickly triggers the extra weight fee, which almost DOUBLES the price of the bag if you go over ($79 for the bag/$75 for the next 10 lbs) 3. The fee for a carry-on bag is the same as a checked bag but with a lower size and weight limit. Make it make sense! 4. The seats are terrible. My 2.5 hour flight almost had me losing my mind. I’m 6’3” and my femurs barely fit in the space provided. My knees had to wiggle just right to jam into the crack next to the armrest of the seat in front of me. The cushioning was thin and inadequate. I am tall but I’m not a freak. These seats are unacceptable. 5. I overheard the woman next to me speaking with the gate agent about being charged a $25 fee for not checking in online - she checked in at the airport counter when she arrived. That’s ridiculous. She was old and in a wheelchair. She had a paper boarding pass, and was obviously not tech savvy. She should not be punished for that. 6. They do not have good placement in the terminals. It was always out on the end or down on a subfloor, and we had to walk out on the tarmac almost every time. In Denver. Their home airport! 7. Every time I loaded a new page on the website while buying my tickets or my bags, it was constantly trying to upsell me on some esoteric bundle. Like, a pop-up every time. Very annoying. 8. No screens in the boarding area (at least where we were) to confirm you’re in the right place. Just static gate number signs. I am sure these are standard practices for Frontier, and I should have read more about them before I purchased tickets, but as a result of this single round trip, I do not plan to ever use this cut-rate airline again. I would rather pay the normal amount for a ticket and be treated like a customer instead of a mark.

A

2.0 Poor

Anonymous, Aug 2026

Our flight was delayed 2 hours and when they changed the the time to 1 hour I wasn't alerted and when I checked the gate the plane was still there but they already shut the doors so I had to buy another flight.

A

6.0 Okay

Algernon, Aug 2026

Okay 👍

F

6.0 Okay

Fabian, Jul 2026

Don’t even matter if I write it y'all not going to fix it

A

2.0 Poor

Anonymous, Jul 2026

Never again

A

8.0 Very good

Anonymous, Jul 2026

Great except upon arrival it took them a long time to open the doors

A

10.0 Wonderful

Annette, Jul 2026

Like and airlines should be.

A

10.0 Wonderful

Annette, Jul 2026

Frontier feels like a family I Worked for Eastern Airlines back in the day and I felt the family vibe that I had then. Thank you

L

2.0 Poor

Lateefat, Jul 2026

Terrible. Delayed my family flight for several hours affecting family plans

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