After debuting Comfort+ as a bookable fare on domestic flights last fall, Delta Air Lines has taken the next step. For flights on or after September 19, 2016 "to and from the Asia-Pacific and Latin America/Caribbean regions," customers can book Comfort+ as a fare rather than a seat upgrade option.
Read MoreAmerican Airlines will launch Premium Economy on its international fleet starting in late 2016. This appears to be a shrewd move to optimize profitability, but what impacts will it have on frequent flyers? Also, is this only the first step for domestic carriers trying to keep up with the in-flight experiences of international competitors?
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