Carriers

This page lists the 12 carrier codes that appear in the 2026 Q1 data, with how many of the 1000 routes each one is the largest carrier on and how many it is the lowest-fare carrier on. It comes from the U.S. Department of Transportation Consumer Airfare Report Table 1, the named source behind every other page on this site.

• Southwest — largest carrier on 234 routes · lowest-fare carrier on 355 routes
• American — largest carrier on 211 routes · lowest-fare carrier on 110 routes
• Delta — largest carrier on 194 routes · lowest-fare carrier on 15 routes
• United — largest carrier on 161 routes · lowest-fare carrier on 34 routes
• Alaska — largest carrier on 76 routes · lowest-fare carrier on 59 routes
• Allegiant — largest carrier on 45 routes · lowest-fare carrier on 87 routes
• JetBlue — largest carrier on 30 routes · lowest-fare carrier on 44 routes
• Breeze — largest carrier on 17 routes · lowest-fare carrier on 40 routes
• Frontier — largest carrier on 14 routes · lowest-fare carrier on 156 routes
• Spirit — largest carrier on 9 routes · lowest-fare carrier on 76 routes
• XP — largest carrier on 5 routes · lowest-fare carrier on 4 routes
• Sun Country — largest carrier on 4 routes · lowest-fare carrier on 20 routes

Source: U.S. Department of Transportation, Consumer Airfare Report Table 1, 2026 Q1. Across the 1000 routes, 1000 rows carry one largest-carrier code and 1000 rows carry one lowest-fare-carrier code; each code is written here exactly as the source data carries it. Fetched 2026-09-27T00:40:04Z. Source data.