Hub Airlines

Carriers that maintain hub or focus operations at one or more of the 50 busiest U.S. airports. Each airline page lists the airports where the carrier has a meaningful share of departures.

• Alaska Airlines

  5 hub airports

  SFO, SEA, SAN, PDX, SJC

• Allegiant Air

  1 hub airport

  LAS

• Amazon Air

  1 hub airport

  CVG

• American Airlines

  12 hub airports

  LAX, ORD, DFW, JFK, CLT, PHX, MIA, PHL…

• DHL Aviation

  1 hub airport

  CVG

• Delta Air Lines

  10 hub airports

  ATL, LAX, JFK, SEA, BOS, MSP, DTW, LGA…

• FedEx Express

  2 hub airports

  IND, MEM

• Frontier Airlines

  2 hub airports

  DEN, LAS

• Hawaiian Airlines

  1 hub airport

  HNL

• JetBlue Airways

  4 hub airports

  JFK, MCO, BOS, FLL

• Southwest Airlines

  22 hub airports

  DEN, MCO, PHX, FLL, BWI, SAN, MDW, HOU…

• Spirit Airlines

  4 hub airports

  LAS, MCO, DTW, FLL

• Sun Country Airlines

  1 hub airport

  MSP

• United Airlines

  6 hub airports

  LAX, ORD, DEN, SFO, EWR, IAH