Cheap flights from St. Louis, MO to Indianapolis, IN
Flights starting at $45. Choose between United Airlines, Frontier Airlines, or Spirit Airlines to find the best price.
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Tips to know when travelling to Indianapolis
Cheapest one-way trip | $136 |
---|---|
Cheapest nonstop round-trip | $346 |
Cheapest round-trip | $344 |
Most popular airline | United Airlines |
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The most popular airlines for this route are United Airlines, Frontier Airlines, Spirit Airlines, Allegiant Air, and Alaska Airlines. St. Louis and Indianapolis have 119 direct flights per week.
Check-in for a flight from St. Louis to Indianapolis
Name | Carrier code | IATA Code | Passport needed during booking | Online check-in available |
---|---|---|---|---|
United Airlines | UAL | UA | Yes | No |
Frontier Airlines | FFT | F9 | No | Opens 24 days before flight Closes 1 hours before flight |
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 |
Alaska Airlines | ASA | AS | No | Opens 24 days before flight Closes 1 hours before flight |
Weather in Indianapolis
Average Weather
Month | Average monthly max temperature | Average monthly min temperature |
January | 1°C | -5°C |
February | 4°C | -3°C |
March | 10°C | 1°C |
April | 16°C | 6°C |
May | 22°C | 13°C |
June | 26°C | 17°C |
July | 28°C | 19°C |
August | 27°C | 18°C |
September | 25°C | 15°C |
October | 18°C | 8°C |
November | 10°C | 2°C |
December | 4°C | -1°C |
14 day forecast
Frequently asked questions
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