External Variable
Semantics
Range
Default
Example
ai
Affiliate identifier provided by Kayak.com.
Character string. No embedded whitespace or special characters.
Empty string.
p
Optional Sub-Affiliate identifier. This is a
pass-thru value from Kayak's perspective; used by affiliate for
internal promotion tracking if desired.
Character string. No embedded whitespace or special characters.
Empty string.
-none-
promo1
promo2
do
Answers the question: "Should we do the search as opposed to just
pre-populating the search form?".
y,n,on,off
y
y
n
df
Date format for dates in this request.
us1, mdy, dmy, ymd
us1
us1 (MM/DD/YYYY)
mdy (MM/DD/YYYY)
dmy (DD/MM/YYYY)
ymd (YYYY/MM/DD)
d1
Pick-up Date.
Format specified by field df. (MM/DD/YYYY)
1 day in the future
d2
Drop-off Date.
Format specified by field df. (MM/DD/YYYY)
4 days in the future
t1
Pick-up hour.
0->23 military time
9
0
5
9
18
t2
Drop-off hour.
0->23 military time
9
0
5
9
18
ap
Airport Code
3 character airport code.
ap2
Drop-off Airport Code
3 character airport code.
crc
City, Region, Country combined in single string separated
by commas.
We assume a comma separated list of City, State, Country.
crc2
Drop-off City, Region, Country combined in single string separated
by commas.
We assume a comma separated list of City, State, Country.
b
Brand Identifier used to preset the search-result filter so that only
this brand is shown in the initial results.
Brand identifier as shown in the list under Example column.
advantage
alamo
budget
enterprise
dollar
national
thrifty
hertz
payless
avis
fox
autoeurope
onetravel
orbitz
ace
ez