Can you fly or take a long trip after donating blood?
Short trips are usually fine. For flying or a long drive, it is best to wait several hours and be well hydrated, and not to donate right before an early flight.
A donation takes about a pint of blood. Your plasma starts to come back within hours, but you may feel lightheaded during the day, especially if you did not hydrate well.
Short trips (up to 2 hours)
For most people without symptoms and well hydrated, these are fine:
- Rest 10 to 15 minutes at the site and have your snack
- Carry water
- If you drive, make sure you are not dizzy
Long drives and bus rides
Not recommended right after donating. Sitting still for many hours with a reduced blood volume can add to dizziness.
Flying
Airplane cabins are pressurized to an altitude of roughly 6,000 to 8,000 feet. The lower oxygen level can add to lightheadedness right after donating.
| Trip | Suggestion |
|---|---|
| Short flight (under 1 hour) | Fine if you feel well and are hydrated |
| Medium flight (2 to 4 hours) | Wait about 12 hours if you can |
| Long flight (over 4 hours) | Wait 24 hours, or donate the day before you travel |
Pilots
If you fly aircraft for work, check your employer or aviation rules, which may set a separate wait after donating.
Tips
- Drink extra fluids
- Avoid alcohol for 24 hours
- If your travel is soon, give blood a few days earlier
This information is general and does not replace advice from a health professional. Your eligibility is always decided at the donor screening on the day of donation. Rules change, so confirm with the American Red Cross or the blood center where you plan to donate.