American Airlines and United Airlines filed modest price hikes on many one-way fares

. United's $5 increase applies "to walk-up, 3-day, 7-day, 14-day and 21-day advance purchase buckets," according to fare watcher FareCompare. J.P. Morgan Securities analyst Jamie Baker said United's move is likely to stick since it--unlike American's $3 to $5 fare hike--excludes markets in which Southwest Airlines operates.