Cheap flights from Knoxville, TN to San Antonio, TX
Flights starting at $45. Choose between Spirit Airlines, Allegiant Air, or Frontier Airlines to find the best price.
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Cheapest one-way trip | $131 |
---|---|
Cheapest round-trip | $190 |
Average round-trip | $276 |
Includes rare itinerary | |
Most popular airline | Spirit Airlines |
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The most popular airlines for this route are Spirit Airlines, Allegiant Air, Frontier Airlines, United Airlines, and JetBlue Airways. Knoxville and San Antonio have 133 direct flights per week.
Check-in for a flight from Knoxville 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 |
Allegiant Air | AAY | G4 | No | Opens 24 days before flight Closes 1 hours before flight |
Frontier Airlines | FFT | F9 | No | Opens 24 days before flight Closes 1 hours before flight |
United Airlines | UAL | UA | Yes | No |
JetBlue Airways | JBU | B6 | No | Opens 24 days before flight Closes 2 hours before flight |
Weather in San Antonio
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