Husband wants to travel internationally at 35 weeks

Would you be okay with your husband going to his only sisters wedding while you are 35-36 weeks pregnant? I’m trying to be okay with it because he is so stressed about missing it but I am not sure if I have the strength to let him go. The flight is 20 hours and there is absolutely no way he could get back to me if I need him. I am a FTM and have had no complications so far and my parents are planning to come, but I am still anxious about this entire situation. Please I need some advice.

For more context his plan is to leave Saturday night and be back Thursday at noon. He has not back to his home country for 8 years nor seen his parents for 3 which is another driver. His grandparents are over 90 and he is afraid he is not going to get a chance to see them again if he doesn’t go now. He said he won’t go if I tell him not too but I don’t know if I can handle the guilt of it of asking him to stay.

Edit: thank you for your comments, this made me feel better hearing your opinions. To answer a few questions the plan is to go to the doctor Friday for my 35 week appointment and as long as I’m cleared he would leave Saturday late night, be back Thursday morning and my 36 week appointment is Thursday afternoon. My parents live far so they are planning to come stay with me the entire time to take care of me