I booked my husband and I in premium economy. The first leg lands in DCA for 30 minutes before we board the 2nd leg. That 2nd flight is from DCA to MIA. I am hoping to have time to grab a sandwich for both of us to eat on the flight. If there’s any delay and I don’t have time, is there anything we can purchase onboard the flight to eat? We have flown in PE before on American, but not for 3 hours. Thanks for any insight.