Less than a month before departure
1-3 months before departure
4-6 months before departure
More than 6 months before departure
Family or friends' schedules
18
16
9
7
Flexibility in travel dates
14
9
5
1
Work or school schedule
13
16
17
9
Preference for planning ahead
12
22
21
25
Concern about price increases
10
11
17
17
Availability of desired accommodation (s) or flight (s)
9
15
16
9
Special promotions or discounts
7
7
6
15
Uncertainty about travel restrictions
3
1
2
7
Other
10
1
7
8