U.S. airline fares fell 0.9% M/M in June to mark the third month in a row the national average dropped .
The average fare during the month was 5.9% lower than the level from a year ago on an unadjusted basis.
The fare decrease falls in line with comments from American Airlines execs on price pressure in some key markets.
The U.S. airline industry is already battling higher fuel and labor costs this summer.
Related ETF: JETS.
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