$190 Find Cheap Flights from San Francisco to Key Largo

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Francisco to Key Largo departing on 7/24. 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, 0 bags

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Everything you should know

Cheapest round-trip
$276
Typical prices: $336-$472
Frontier
Mon 7/20Wed 7/29
SFO - MIA • 2 stops
Cheapest non-stop
$293
Typical prices: $280-$433
American Airlines
Sat 8/15Tue 8/18
SFO - MIA • Non-stop
Arrival airport
You can't fly directly to Key Largo. It is served by Miami (MIA), located 49.7 miles from Key Largo.
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Flight Deals
Useful Info
Flight Deals

Cheap Flights from San Francisco to Key Largo (SFO-MIA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Francisco to Key Largo 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 San Francisco to Key Largo

Mon, Jul 20 - Wed, Jul 29
Frontier Logo
9:00 pm - 12:31 am
SFO
-
MIA
24h 31m
2 stops
Frontier Logo
6:00 am - 11:27 am
MIA
-
SFO
8h 27m
1 stop
$276Frontier
Mon, Jul 20 - Wed, Jul 29
Frontier Logo
9:00 pm - 12:31 am
SFO
-
MIA
24h 31m
2 stops
Frontier Logo
6:00 am - 11:27 am
MIA
-
SFO
8h 27m
1 stop
$277Frontier
Tue, Jul 21 - Tue, Jul 28
Frontier Logo
9:00 pm - 12:31 am
SFO
-
MIA
24h 31m
2 stops
Frontier Logo
6:00 am - 11:43 am
MIA
-
SFO
8h 43m
1 stop
$278Frontier
Mon, Aug 31 - Sat, Sep 5
Delta Logo
7:13 am - 5:59 pm
SFO
-
MIA
7h 46m
1 stop
Delta Logo
6:40 am - 1:09 pm
MIA
-
SFO
9h 29m
1 stop
$279Delta
Fri, Jul 10 - Tue, Jul 14
Frontier Logo
11:00 pm - 1:53 pm
SFO
-
MIA
11h 53m
1 stop
Frontier Logo
10:15 pm - 10:30 am
MIA
-
SFO
15h 15m
1 stop
$280Frontier
Wed, Jul 22 - Tue, Jul 28
Frontier Logo
12:29 am - 2:12 pm
SFO
-
MIA
10h 43m
1 stop
Frontier Logo
6:30 am - 7:52 pm
MIA
-
SFO
16h 22m
2 stops
$282Frontier
Thu, Aug 13 - Tue, Aug 18
Frontier Logo
6:04 pm - 5:51 am
SFO
-
MIA
8h 47m
1 stop
Frontier Logo
8:00 am - 7:56 pm
MIA
-
SFO
14h 56m
2 stops
$283Frontier
Mon, Jul 6 - Fri, Jul 17
Frontier Logo
11:00 pm - 1:53 pm
SFO
-
MIA
11h 53m
1 stop
Frontier Logo
10:15 pm - 7:52 pm
MIA
-
SFO
24h 37m
1 stop
$284Frontier
Wed, Sep 30 - Thu, Oct 8
Frontier Logo
7:17 pm - 5:48 am
SFO
-
MIA
7h 31m
1 stop
Frontier Logo
7:20 am - 12:15 am
MIA
-
SFO
19h 55m
1 stop
$285Frontier
Tue, Jul 28 - Mon, Aug 3
Frontier Logo
9:00 pm - 12:31 am
SFO
-
MIA
24h 31m
2 stops
Frontier Logo
10:15 pm - 10:30 am
MIA
-
SFO
15h 15m
1 stop
$287Frontier
Useful Info

Good to know

Low seasonSeptember
Cheapest flight$190
Best time to beat the crowds with an average 16% drop in price.
Most popular time to fly with an average 18% increase in price.
Flight from San Francisco to Miami

When to book flights from San Francisco to Key Largo

Are your dates flexible? Find out the best times to travel from San Francisco to Key Largo based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

FAQs for booking flights from San Francisco to Key Largo

  • Which airports will I be using when flying from San Francisco to Key Largo?

    When flying out of San Francisco you’ll be using San Francisco. Key Largo does not have its own airport so you’ll be flying into nearby Miami airport, which is 49.7 mi away.

  • How long does a flight from San Francisco to Key Largo take?

    Direct flights cover the 2,579 miles separating San Francisco and Key Largo in about 5h 41m.

  • How many flights are there between San Francisco and Key Largo?

    28 direct flights run between San Francisco and Key Largo on a daily basis. On average, there are about 197 departures each week.

  • What’s the cheapest day of the week to fly between San Francisco and Key Largo?

    Consider leaving on a Monday and avoid Thursdays if you are looking for the best rates. For your return to San Francisco, you’ll find the best rates on Wednesdays and the most expensive ones on Sundays.

  • How does KAYAK find such low prices on flights from San Francisco to Key Largo?

    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 San Francisco to Key Largo.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Key Largo from San Francisco 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 San Francisco to Key Largo?

    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 Key Largo with an airline and back to San Francisco with another airline.

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

    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 Key Largo from San Francisco up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which airlines provide the cheapest flights from San Francisco to Key Largo?

    In the last 5 days, the cheapest one-way ticket between San Francisco and Key Largo found on KAYAK was with Frontier for $75. Delta offered a round-trip connection from $139 and Frontier from $162.

Top tips for finding cheap flights from San Francisco to Key Largo

  • There is no airport in Key Largo. Instead, you’ll be flying into Miami Airport when flying between San Francisco and Key Largo.
  • The cheapest flight from San Francisco to Key Largo was found 65 days before departure, on average.
  • Book at least 2 weeks before departure in order to get a below-average price.
  • High season is considered to be November, December and January. The cheapest month to fly is September.

Reviews of the top 5 airlines serving San Francisco to Key Largo

 
Need help choosing which airline to fly with from San Francisco to Key Largo? 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.
7.8
DeltaOverall score based on 8438 reviews
8.5Crew
7.8Entertainment
8.1Boarding
7.2Food
7.8Comfort
Airline reviews

Flight delayed four separate times. I’m now one hour hours late to landing.

2.0 MediocreTravis, Jun 2026
SFO - LAX
Read more Delta reviews

Flight delayed four separate times. I’m now one hour hours late to landing.

The plane was an older model, so it wasn’t as comfortable as others. The flight attendants were not helpful during onboarding. It was a full flight so there was chaos finding space for baggage.

Awesome! On time flight, early arrival, and a complimentary upgrade!

Delta’s staff is unmatched. From the gate agents, to the pilots, to the flight attendants… all top of the industry.

Our flight from SFO to MSP was right on time on 11/15/2025. No delays. As we approached MSP at about 8 pm, we circled in the air until 8:40 pm so I don't call that efficient for MSP. I think the captain should announce the delay and why. (as if we all don't know that we are just circling around the area, slowing down, speeding up, slowing down.) Thank you. Marilyn Fischer

Excellent flight, the planes were newer, they did a nice job with boarding, great service overall.

Thank you for not flipping the plane on the run way. You guys get a 5 star rating for the flight!!!

Boarding is, as it always is… horrible. Gate lice. Slow moving zones. Too many people with carry ons

New boarding doesn't make sense. Filling front first is slow.

There was plenty of overhead room but half of the passengers were told they had to check their carryon bags. My partner and I checked in as early as possible and our seats were split across the aisle.

Lost one piece of luggage even though I checked in 2.5 hours before the flight

Horrifying Almost 2 million miles. Bring your own food and drink. One coffee or drink every three hours. Have to order meals on app more than 24 hours ahead Tiny and dirty bathrooms

My service dog and I were asked to deplane just before they closed the door - clearly very last minute they couldn’t find the documentation that I have filled out many many times before that is for flying service animals. I purposely purchase 3seats (a whole row) since he is large and not all passengers want to sit next to a dog on a cross country flight. The plane departed with my husband on it!!! They made me fill out a hard copy of the same form and had to reschedule me on a later flight where they could find 3 seats together!! I’ve done this so many times before - clearly the error was on their part in a technology glitch - but really people - do better!! Very traumatic - and my husband had to wait for us when he landed ….so bad. Poor pup was confused and tired.

No screens or meal options. Freezing cold. Dirty seats. Left late.

Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time

It was a red-eye, but the flight felt surprisingly quick. The seats were very comfortable, and that made resting much easier. I also want to thank the gentleman seated next to me, who graciously moved so my mom could sit beside me. We slept almost the entire way. The cabin crew was respectful in not disturbing us, while also being courteous and professional throughout. Thank you, United.

Boarding was again a "free for all". We were boarding group 4, and almost the entire plane was able to board before us. It's a shame that someone who follows the rules, gets the short end of the stick. Not fair.

It was perfect! I've never flown with United before, but I definitely will in the future

They delayed the flight from 9:00 to 11:55 At 11:45 they canceled the flight. I paid a premium price for the tickets with poor service

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

Flight was delayed multiple times without giving any particular reason and the only thing that was communicated was that 'Aircraft is getting ready'. I was stuck at SFO airport for 15 hours and finally took Southwest Airlines flight back home to Dallas.

I was not clear if food was offered or not.

Agency very bad had to cancelled my booking too many changes in the flight changed my flight to 1 week

Take-off delayed an hour because of a missing flight officer, so,arrived in Charlotte lates causing many passengers to miss connections. Otherwise a very good flight, safe and comfortable, with an excellent professional crew.

The SFO Lounge crew were amazing. The bartender Faris was great. Thanks!

Not good. One of my luggage is missing. And until now they can’t find it

Dloght delayed by 2.5 hrs . Common theme in my last four american floghts

It was a red eye flight, so no meals were provided, but it was fine with snacks. The seats felt cramped and almost too narrow.

It was the worst experience ever. Cabin temperature cold, for which they did not have any blankets upon my asking. We paid $125 extra for each passenger to get extra space sits; the sits were ridiculously small, tight, and uncomfortable! The flight attendant dropped ice on me and my sister! All in all, American Airlines deserves below zero!

No meal on a cross country flight? SFO-MiA is pretty much the definition of a coast to coast flight. No meal provided. Sky high wi-fi rates too. Stop nickel and diming your customers.

Seats were great, the staff was great, and the food was about the best I've had on a plane, and is especially the best of any US-based carrier I've flown. Free Wi-Fi was also great.

It was inexplicably canceled and we are stuck in LA, haven't gotten home and it has been an inconvenience having lost work (on unpaid leave for my husband).

Rude crew member. She seemed annoyed at me without me saying a single word. Also loudly admonished me for having my bag next to my seat instead of tucked away before landing. Just telling me to put it away and guiding me without giving me a lecture would have been enough.

Too many long delays with JetBlue. Worst major airline that serves JFK but unfortunately I keep going back because of the prices.

Little snafu at boarding. Staff communicated with gate poorly. Flight attendant was rude making disembark early. This was an older mint class. Needs an overhaul for sure. Food was good. The male flight attendant was really nice.

They put me on a chair in between two men, one overweight who was almost falling on top of me, and the other was even uncomfortable because I was half falling because of what the other was pushing me. I stayed with. my feet were swollen from fluid retention and from being unable to accommodate myself. it was very uncomfortable. I asked for help but they told me that the flight was full and they couldn't help me. I got off the plane almost unable to walk due to the inflammation. and then at FLL airport I asked for help because I couldn't go to my next flight, which was a connection.

I really liked the way snacks and drinks were available throughout the flight!!! The flight attendants were also all fantastic!

Always like Jet Blue! It seems, however, that people are getting bigger & seats are getting smaller! We had a very full flight and I couldn't get an aisle seat like I always do. I wish there were more leg room. People sitting next to me were very nice though so it was fine to disturb them if I needed to use the restroom. Otherwise the flight was fine but a bit long.

None of the in flight Direct TV worked. A better selection of Shows would have been better. The baggage was s low. Otherwise we enjoyed our flight!

the staff was very helpful and the airline was very good.

They didn’t offer a water, even after I asked

Frontier had yet another flight cancellation. Have never made a complete round trip with this airline without at least one leg getting cancelled. Miserable flights - dirty, uncomfortable planes that apparently always have issues since I've had multiple delays and cancellations with them.

No frills for sure. No gate announcements about flight delay, not even water to drink on the flight.

I loked walking out on the tarmac to board and no first class. I didn't like that they have no snacks or onboard wifi to bide your time.

It was a redeye flight, so every passenger just wanted to sleep, but through the entire flight, the flight crew made announcements over the loudspeaker at maximum volume every few minutes making sleep impossible. For example: it’s 2am, and the crew decides to give an extremely detailed announcement about snacks and beverages for sale. And 3am is the perfect time to wake up everyone with a lengthy announcement about how to get a coffee refill and how to take advantage of new offer from frontier for a credit card.

While booking it was not obvious that I had to pay for carryon. Realized it only during check-in. Overall, meh!

Stop changing gates at sfo. When you are elderly going back for it’s not fun.

After 5 hours of delay, they cancelled the flight. Very disappointed

My flight to LA was cancelled. I waited at the airport for 3 hrs saying it was delayed and then all of a sudden it was cancelled. Frontier only gave me a voucher and refund but could not rebook me. Flights on other airlines were too expensive last minute. I had to drive down to LA and didn’t even take my return flight home since I had to drive. One of the worst airline experiences in my life. It’s crazy how airlines can just upend people’s plans just like that.

The flight attendence were extremely rude and I am disabled

Everything you need to know for your flight from San Francisco to Key Largo

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