September is full of vibrant events on both ends of your journey. Near Appleton, enjoy the Fox Cities Oktoberfest and weekly farmers’ markets, drawing foodies and families alike. Upon arrival in Upstate South Carolina, Greenville’s Fall for Greenville food festival launches preview activities, Spartanburg’s International Festival offers cultural performances, and college football excites fans in nearby Clemson. These events make September a great time for a trip, combining local flavor with community celebration.
The best time to fly from Appleton (ATW) to Greenville–Spartanburg (GSP) in September is midweek, particularly Tuesdays and Wednesdays, which historically offer quieter flights and the lowest fares. Booking your ticket in late August or the first week of September can help secure the best deals. Avoiding weekends and flying after Labor Day yields both savings and less crowded airports. Early morning flights further reduce potential delays and maximize fall daylight for your trip.
All flights from Appleton International Airport (ATW) to Greenville–Spartanburg International Airport (GSP) require at least one layover, typically via Chicago O’Hare, Detroit Metro, or Atlanta Hartsfield-Jackson. Connecting flights often add flexibility in terms of scheduling and fare options, but can increase total journey time by 1-3 hours. In September, allow ample time for connections, especially in major hubs prone to weather delays. If maximizing convenience and minimizing risk of missed connections is a priority, look for routes with a single short layover, ideally under two hours.
The most popular carriers for ATW to GSP flights in September are Delta Air Lines (via Atlanta), American Airlines (via Chicago O’Hare), and United Airlines (via Chicago O’Hare or Detroit). Delta is known for frequent schedules and reliable connections through ATL with strong on-time performance. American and United both offer competitive fares and usually similar travel times, with slight differences in baggage policies and aircraft amenities. For travelers seeking seat upgrades or premium cabin comfort, Delta and American often provide more options. Review each airline’s change/cancellation policies, as well as loyalty program benefits, before booking.
Pack for variable weather: Wisconsin mornings can be crisp while Upstate South Carolina enjoys mild, sunny afternoons and occasional fall rain. Dress in layers and bring a light rain jacket for both departure and arrival. Arriving early at both airports helps avoid last-minute stress, as September post-summer schedules can be unpredictable. Double-check flight status for seasonal weather delays, and book rental cars in advance for greater vehicle selection at GSP. Finally, enjoy smaller crowds and autumn scenery along your route!
There are currently no nonstop flights between Appleton International Airport (ATW) and Greenville–Spartanburg International Airport (GSP). Typical routes involve one-stop connections through Chicago O’Hare (ORD), Detroit (DTW), or Atlanta (ATL), with average total travel time from 4.5 to 6.5 hours including layover. Most departures from ATW are in the early morning, arriving into GSP by early to mid-afternoon. Make sure to confirm your September flight times in advance and check for updated schedules as airlines adjust for seasonal demand.
September typically offers some of the best values for travelers flying from Appleton International Airport (ATW) to Greenville–Spartanburg International Airport (GSP). Airfare decreases after Labor Day, with average one-way fares starting from $130 to $180 depending on advance purchase and flight connections. Booking 3-5 weeks ahead and flying on Tuesdays or Wednesdays often unlocks the lowest prices. Setting flight fare alerts and using flexible date calendars on popular travel sites can help you spot last-minute deals on the ATW-GSP route.