You're close. From the paper [1]:

a 12 g boreal forest songbird, completes an autumn transoceanic migration ranging from 2270 to 2770 km (mean ± s.d.: 2540 ± 257) and requiring up to 3 days (62 h ± 10) of non-stop flight

[1] http://rsbl.royalsocietypublishing.org/content/11/4/20141045