Online travel agency air transactions settled through ARC increased 19.54% in November 2009, compared with the previous November, as the OTAs continue crunching torrid volumes of transactions after eliminating consumer booking fees on flights in March and April.

And, in a hopeful sign for corporate travel, mega corporate travel management companies saw their transactions climb 5.86% for November, their first increase this year after 10 previous months of declines.

To provide some perspective, ARC’s overall transactions were up 8.64% for the month, which was only the second monthly increase in 2009. October’s 5.13% jump in overall air transactions settled through ARC was the year’s first monthly jump.