The airline reported earnings of US$3.23 per share on revenue of US$10.78bn compared with US$2.76 on revenue of US$10.01bn in the previous year’s second quarter.
The Chicago-based company beat Wall Street estimates of US$3.07 EPS on revenue of $10.72bn.
“These results are the strongest evidence yet that our strategic growth plan is working, and we are well positioned to carry our momentum into the second half of the year,” said CEO Oscar Munoz in a press release.
The airline forecast adjusted profit for the full year to be between US$7.25 and US$8.75, an increase from its previous range of US$7 to $8.50.
The airline is looking to update its fleet with more efficient planes. The newer jets use around 20% less fuel than older jets.
The airline operates around 4,600 flights per day across five continents, making stops in 357 airports.
Shares of the airline were up nearly more than 2% to US$73.88 in Tuesday after-hours trading.