COVID testing is not available at the airport.  All travelers are recommended to get necessary testing BEFORE coming to the airport at places such as Walgreens, CVS, etc.  While we do not vouch for the following establishment, it apparently offers testing nearby:

Chantilly Medical Center:  call first; cash/credit only

14016 Sullyfield Circle, Suite C (back of building)

Chantilly, VA 20151

703-631-0791

Monday – Wednesday:  9-4 pm

Thursday:  9-1 pm

Friday:  9-4 pm

Saturday:  9-2 pm

Sunday:  Closed.

RAPID test: Valid 4-6 hours before flight $120

PCR/NAAT/MOLECULAR Standard: Valid for 72 hours $175 results in 24 hours (provided to your personal email/paper)