Skift Take

There are more than a few surprises in the top 10 ranking, which shows that even in winter, there is no shortage of off-peak demand.

Gordon Smith

It might be January, but there are still millions of Americans taking to the skies. With vacationers seeking the winter sun and business travelers shuttling between major hubs, there’s little time for the nation’s airlines to hibernate. 

Yesterday we brought you the world’s busiest international routes. Today, we’re drilling down into the U.S. domestic market.

Using the latest data from analytics firm OAG, Skift can reveal the sky-high links that had the most capacity this month. The full top 10 ranking is below, but here’s a little more context for the top five routes in our countdown:

#5: Las Vegas to Los Angeles (261,334 seats)

A whopping seven different airlines fly between Las Vegas and L.A., which helps promote healthy competition for price-conscious passengers. In January, Southwest Airlines operated the most flights