We flew international this past summer with BOGO, Newark to Heathrow in London with a transfer in Montreal on Air Canada and then back to Newark from Reykjavik on Iceland Air. We were not charged for our checked bags.
For Canada Air we were not supposed to be able to pick our seats to be assigned without extra pay until much later. But I had told the air representative when I called to give our loyalty number and request vegetarian meals that we were going on a cruise from there to celebrate our 46th wedding anniversary. He then said could I hold on, and he would see what he could do. He then assigned our seats, and I thanked him.
BTW, anyone who ends up with Iceland Air, they do not include a free meal even on transatlantic flights. We had flown with them before and knowing that bought food at the terminal for our flight back home.