11.  The sale fares are nonrefundable, but unused tickets may be applied toward future travel.

12.  They are nonrefundable but may be applied toward future travel on Southwest.

13.  Tom Parsons, publisher of Best Fares, a widely quoted airfare newsletter, says that likelihood makes this a great time to buy tickets for future travel needs.

14.  What remains unclear is the effect of the crash on future discretionary travel in the holiday season, whatever the cause of the crash.

15.  Afterward, the patriarch said he told Bush of his recent visit to Iran, an earlier trip to Bahrain and possible future travel to another Muslim nation.

16.  Amtrak passengers who believe they did not receive a safe, comfortable and enjoyable trip will be entitled to a certificate good for future Amtrak travel at equal cost.

17.  He promised a solution that would make future travel restrictions for non-EU nationals as lenient as possible.

18.  He promised to seek a solution that would make future travel restrictions for non-EU nationals as painless as possible.

19.  The government was then to have cashed the miles and points to pay for future travel costs.