Ask your OB po. I don't have high risk pregnancy pero I wasn't allowed by my OB to attend my Palawan and Japan trips hehe. In case you're allowed, bring a medical certificatr and notify the airline as well about your pregnancy po.
If hinde naman maselan i think papayagan ka naman ni ob
Ask ko tlga muna c ob. Thanks dear.
Jhen Mampo Datul