We had to apply in person at the RTE Bern. I could give in the papers for the COE at the same time.The lady will put in the copy for the visa and we will get the COE by mail about 3 days before flying. Concerning flights, Lufthansa, Swiss,Austrian,KLM are flying from Europe and some more. Perhaps have a look flying through Germany or Switzerland. Just keep the 72 hours in mind for the covid test and fit to fly certificate - no long stop overs