After you get off the train from Taiyuan Railway Station, if you arrive at 9:40 and there are no excessive delays, you usually have time to catch the 11:20 flight. However, the following factors need to be considered in specific situations:
Time to get to the airport after getting off the train: The time from Taiyuan Railway Station to the airport depends on the means of transportation (such as taxi, bus or subway) and traffic conditions. It usually takes about 1 hour to 1 hour and 30 minutes.
Airport security check and preparation time before boarding: Security check usually takes 30 minutes to 1 hour, depending on the amount of people at the airport.
Special circumstances: Situations such as weather, flight delays or traffic jams may also affect your itinerary.
To sum up, if you can complete all aspects smoothly and do not encounter unexpected delays, it is possible to catch the 11:20 flight. However, it is recommended that you prepare in advance and leave enough time to ensure nothing goes wrong.