From the earnings call - look it takes DL up to 24 months to get an international route to work. Interesting that if another airline enters an international market they are accused of losing money - I guess it's OK to lose money up to 24 months but not others.
"As we mature that growth and lap that growth we will see certainly some improvements in our overall unit revenue performance. Any time you’re expanding in international markets it generally takes 12 to 24 months before the market starts to fully develop for you and you will see some natural improvements as we temper our capacity additions. The other factor is Venezuela which had an outsized level of unit revenue performance. With the currency changes we decided last year to pull down our frequencies and as we lap that there will also be a benefit to our Latin unit revenues in the second half of this year."
"As we mature that growth and lap that growth we will see certainly some improvements in our overall unit revenue performance. Any time you’re expanding in international markets it generally takes 12 to 24 months before the market starts to fully develop for you and you will see some natural improvements as we temper our capacity additions. The other factor is Venezuela which had an outsized level of unit revenue performance. With the currency changes we decided last year to pull down our frequencies and as we lap that there will also be a benefit to our Latin unit revenues in the second half of this year."