Cheap flights from Key West, FL to San Antonio, TX
Flights starting at $116. Choose between Spirit Airlines, Silver Airways, or Frontier Airlines to find the best price.
Make your travel wishlist, we'll do the rest
Hidden deals
Kiwi-Code uncovers prices airlines don't want you to see.
Effortless booking
Use our flexible filters to tailor your search.
Travel hacking
Look out for the travel hack star icon for even cheaper fares.
Tips to know when travelling to San Antonio
Cheapest one-way trip | $116 |
---|---|
Cheapest round-trip | $240 |
Average round-trip | $328 |
Includes rare itinerary | |
Most popular airline | Spirit Airlines |
Receive exclusive deals by email
By subscribing you agree to receive offers according to the conditions described in our Privacy Policy.
The most popular airlines for this route are Spirit Airlines, Silver Airways, Frontier Airlines, Allegiant Air, and Sun Country Airlines. Key West and San Antonio have 53 direct flights per week.
Check-in for a flight from Key West to San Antonio
Name | Carrier code | IATA Code | Passport needed during booking | Online check-in available |
---|---|---|---|---|
Spirit Airlines | NKS | NK | No | Opens 24 days before flight Closes 1 hours before flight |
Silver Airways | SIL | 3M | No | Opens 24 days before flight Closes 2 hours before flight |
Frontier Airlines | FFT | F9 | No | Opens 24 days before flight Closes 1 hours before flight |
Allegiant Air | AAY | G4 | No | Opens 24 days before flight Closes 1 hours before flight |
Sun Country Airlines | SCX | SY | Yes | No |
Weather in San Antonio
Average Weather
Month | Average monthly max temperature | Average monthly min temperature |
January | 17°C | 7°C |
February | 19°C | 9°C |
March | 23°C | 12°C |
April | 27°C | 16°C |
May | 30°C | 19°C |
June | 34°C | 23°C |
July | 35°C | 24°C |
August | 36°C | 25°C |
September | 32°C | 22°C |
October | 28°C | 17°C |
November | 21°C | 12°C |
December | 18°C | 9°C |
14 day forecast
Frequently asked questions
Planning a trip? Thanks to our Virtual Interlining algorithm, we offer billions of route combinations between any A and any B in the world by plane, train, and bus. Find the cheapest routes and best deals for you, as well as the best dates on which to travel.
Explore alternative trips
Flights from Key West
- Flights from Key West to Philadelphia
- Flights from Key West to Denver
- Flights from Key West to Washington, D.C.
- Flights from Key West to Tampa
- Flights from Key West to Detroit
- Flights from Key West to Fort Lauderdale
- Flights from Key West to Orlando
- Flights from Key West to Minneapolis
- Flights from Key West to Boston
- Flights from Key West to Nashville
- Flights from Key West to New York
- Flights from Key West to Chicago
- Flights from Key West to Columbus
- Flights from Key West to Atlanta
- Flights from Key West to Cleveland
- Flights from Key West to Pittsburgh
- Flights from Key West to Indianapolis
- Flights from Key West to Charlotte
- Flights from Key West to Las Vegas
- Flights from Key West to Cincinnati
Flights to San Antonio
- Flights from Las Vegas to San Antonio
- Flights from Denver to San Antonio
- Flights from Orlando to San Antonio
- Flights from San Diego to San Antonio
- Flights from Atlanta to San Antonio
- Flights from Los Angeles to San Antonio
- Flights from Phoenix to San Antonio
- Flights from Washington, D.C. to San Antonio
- Flights from Chicago to San Antonio
- Flights from Mexico City to San Antonio
- Flights from Salt Lake City to San Antonio
- Flights from Minneapolis to San Antonio
- Flights from San Juan to San Antonio
- Flights from Charlotte to San Antonio
- Flights from San Francisco to San Antonio
- Flights from Philadelphia to San Antonio
- Flights from Colorado Springs to San Antonio
- Flights from Fort Lauderdale to San Antonio
- Flights from New York to San Antonio
- Flights from Santa Ana to San Antonio
Popular routes
- Flights from New York to Mexico City
- Flights from Fort Myers to Kochi
- Flights from Chicago to Mexico City
- Flights from San Juan to Phuket City
- Flights from Memphis to Larnaca
- Flights from Portland to Mombasa
- Flights from Savannah to Santo Domingo
- Flights from Pittsburgh to Kahului
- Flights from Chicago to Orlando
- Flights from Kailua to Cincinnati
- Flights from Des Moines to Omaha
- Flights from Kahului to Pittsburgh
- Flights from El Paso to Casablanca
Airports near Key West
- Miami International
- Fort Lauderdale–Hollywood International
- Southwest Florida International
- Key West International