Most dedicated airports
Airports where one airline carries most of what leaves, among the biggest US airports in 2025: Southwest at Dallas Love, Allegiant at St. Petersburg, FedEx at Memphis. Pick one to see where it flies and how its routes changed.
Passengers
| # | Airport | City | Biggest airline | Share | Airline's passengers | Airport's passengers | Size rank |
|---|---|---|---|---|---|---|---|
| 1 | SFB | Sanford, FL | Allegiant Air | 99.5% | 3.11 million | 3.12 million | 87 |
| 2 | PIE | St. Petersburg, FL | Allegiant Air | 98.4% | 2.75 million | 2.8 million | 93 |
| 3 | DAL | Dallas, TX | Southwest (incl. AirTran) | 96.8% | 16.1 million | 16.6 million | 33 |
| 4 | HOU | Houston, TX | Southwest (incl. AirTran) | 94.4% | 12.9 million | 13.7 million | 36 |
| 5 | MDW | Chicago, IL | Southwest (incl. AirTran) | 90.3% | 17.1 million | 18.9 million | 31 |
| 6 | LGB | Long Beach, CA | Southwest (incl. AirTran) | 88.6% | 3.36 million | 3.78 million | 78 |
| 7 | OAK | Oakland, CA | Southwest (incl. AirTran) | 76.6% | 7.01 million | 9.15 million | 48 |
| 8 | ATL | Atlanta, GA | Delta (incl. Northwest) | 74.6% | 76.9 million | 103 million | 1 |
| 9 | BWI | Baltimore, MD | Southwest (incl. AirTran) | 71.7% | 17.6 million | 24.6 million | 26 |
| 10 | CLT | Charlotte, NC | American (incl. TWA, US Airways, America West) | 68.9% | 35.8 million | 51.9 million | 11 |
The ten of the 100 busiest US airports by passengers whose biggest airline carries the largest share of them. Passengers are those boarding or leaving there, on flights to and from the airport, domestic and international.
Freight
| # | Airport | City | Biggest airline | Share | Airline's short tons | Airport's short tons | Size rank |
|---|---|---|---|---|---|---|---|
| 1 | ILN | Wilmington, OH | Air Transport International | 99.9% | 289,000 | 289,000 | 24 |
| 2 | IND | Indianapolis, IN | Federal Express | 98.7% | 882,000 | 894,000 | 9 |
| 3 | MEM | Memphis, TN | Federal Express | 98.5% | 3.22 million | 3.27 million | 2 |
| 4 | SDF | Louisville, KY | United Parcel Service | 97.1% | 2.94 million | 3.02 million | 3 |
| 5 | OAK | Oakland, CA | Federal Express | 81.8% | 446,000 | 546,000 | 17 |
| 6 | PHL | Philadelphia, PA | United Parcel Service | 63.8% | 284,000 | 445,000 | 20 |
| 7 | ONT | Ontario, CA | United Parcel Service | 60.0% | 447,000 | 744,000 | 12 |
| 8 | RFD | Rockford, IL | United Parcel Service | 58.1% | 284,000 | 488,000 | 19 |
| 9 | EWR | Newark, NJ | Federal Express | 36.6% | 263,000 | 718,000 | 13 |
| 10 | IAD | Washington, DC | United (incl. Continental) | 34.1% | 98,400 | 288,000 | 25 |
The ten of the 25 biggest US airports by freight whose biggest airline carries the largest share of it. Only a few dozen airports handle much freight, so the pool is smaller than for passengers. Freight is in short tons (2,000 lb).
Share is the biggest airline's part of the airport's total. Airlines that merged are counted together (Southwest includes AirTran, Delta includes Northwest). Regional airlines flying under a major's name are listed on their own, so at that major's hubs its share is understated. Size rank is the airport's place among US airports by the same measure. More on how things are grouped.