The closest major airport to Alton, Illinois is Lambert-St. Louis International Airport (STL / KSTL). This airport is in Saint Louis, Missouri and is 21 miles from the center of Alton, IL. If you're looking for international or domestic flights to STL, check the airlines that fly to STL.
Find some hotels near Alton, IL, or scroll down for more international airports or domestic airports. You can also browse local airports if you're a pilot.
21 miles: Lambert-St. Louis International Airport - Saint Louis, MO (STL / KSTL)
237 miles: Indianapolis International Airport - Indianapolis, IN (IND / KIND)
276 miles: Kansas City International Airport - Kansas City, MO (MCI / KMCI)
278 miles: Chicago Midway International Airport - Chicago, IL (MDW / KMDW)
286 miles: Louisville International Airport - Louisville, KY (SDF / KSDF)
288 miles: Chicago O'Hare International Airport - Chicago, IL (ORD / KORD)
21 miles: Lambert-St. Louis International Airport - Saint Louis, MO (STL / KSTL)
95 miles: Abraham Lincoln Capital Airport - Springfield, IL (SPI / KSPI)
111 miles: Quincy Regional Airport - Quincy, IL (UIN / KUIN)
129 miles: Decatur Airport - Decatur, IL (DEC / KDEC)
9 miles: St. Louis Regional Airport - Alton, IL (ALN / KALN)
35 miles: St. Louis Downtown Airport - Saint Louis, MO (CPS / KCPS)
42 miles: Scott Air Force Base - Belleville, IL (BLV / KBLV)
43 miles: Spirit of St. Louis Airport - Saint Louis, MO (SUS / KSUS)

Travel Math helps you find the closest airport to any city, as well as a list of smaller local airports. You can use these pages to plan your trip and figure out the easiest way to get to your destination. Many times there are multiple airports near the city you want to visit, so you can often find a cheaper flight into a different airport. This is especially useful if you are getting a rental car, since it might be better to drive a bit farther in order to save money on airfare. If you're booking an international flight, you probably want the closest major airport, otherwise if you're a pilot you may be looking for a local airport. Use this tool along with the flight distance pages to plan your travel.
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