Might be time to look at airlines that use planes made by competitors like Airbus. If you want to avoid Boeing planes for your travels, here are some options I found online:
In the US
Spirit, Frontier, and Allegiant are Airbus-only. JetBlue and Breeze are also Boeing-free (only Airbus and Embraer planes).
Europe
EasyJet, Wizz Air, Vueling, Eurowings. Many of the biggest European airlines (Air France, Lufthansa, etc.) only have widebody/long-range Boeing planes;
International
Most of the big Euro carriers (Air France, KLM, Lufthansa, Turkish, British Airways, Virgin Atlantic) have at least some Boeing widebodies. There are still some trans-Atlantic airlines that don't, but you may be limited in your itinerary choices:
• Most notable is Italy's ITA Airways, which is the successor to Alitalia and is Airbus-only. Convenient if you're going to Italy.
• Iberia (Spain) and TAP (Portugal) have decently sized all-Airbus fleets
• SAS (the big Scandinavian airline) and Finnair are Boeing-free
• French Bee only flies the Airbus A350, but they also only have 6 planes and only fly to LA, SF, Newark, and Miami, and only to Paris.