Would advise you to avoid air travel unless absolutely necessary. Flights may cause pressure changes which may exacerbate your condition. Risks include bleeding, abruption ,preterm labour.
Next Steps
1.Do an ultrasound there is a good chance your placenta might have migrated.
2.If it is more than 2 cm away from the os you are good to go
Health Tips
If flying due to unavoidable reasons watch for abd pain, cramps,bleeding and decreased perception of fetal movements