The Congressional Research Service just listed the 42 US aircraft lost or damaged so far during the war with Iran.
4 x F-15E Strike Eagles destroyed
1 x F-35A damaged by Iranian ground fire
1 x A-10 destroyed
7 x KC-135 Stratotankers (2 destroyed, 5 damaged)
1 x E-3 Sentry AWACS damaged
2 x MC-130J destroyed
1 x HH-60W helicopter damaged by small arms fire
24 x MQ-9 Reapers destroyed
1 x MQ-4C Triton destroyed
4 x F-15E Strike Eagles destroyed
1 x F-35A damaged by Iranian ground fire
1 x A-10 destroyed
7 x KC-135 Stratotankers (2 destroyed, 5 damaged)
1 x E-3 Sentry AWACS damaged
2 x MC-130J destroyed
1 x HH-60W helicopter damaged by small arms fire
24 x MQ-9 Reapers destroyed
1 x MQ-4C Triton destroyed