Airlines are still cancelling thousands of flights because of the Boeing 737 Max grounding By: MarketWatch June 28, 2019 at 04:27 AM EDT The cost of air travel could increase for consumers if this situation continues. Read More >> Related Stocks: Alaska Air Group American Airlines Gp Apollo Asset Management Inc Boeing Co Booking Holdings Inc Delta Air Lines Hawaiian Hlds Inc Norwegian Air Shuttle ASA Southwest Airlines Spirit Airlines Inc TripAdvisor United Airlines Holdings Inc