Routes:1) Can I set B-Check and regular flight at the same time?
Yes, you can set the B-Check on every single place at the schedule. It takes always 24hours and you can't part it.2) What happens with the flight(s) I set at the same time with the B-Check?
They are automatically ignored, what means you will not earn money for this flights, but there are also no expenses like fuel or navigation fees. Instead you must pay maintenance costs, the exact amount for your specific aircraft can be seen in the aircraft page
if you click the crossed tools at the very right.
For example (Screenshot below): Place a B-Check for Monday 6am to Tuesday 6am and two regular flights between Monday 5am and Tuesday 13pm. 3) Is it a good idea to serve some routes not every day?
No, that's not a good idea. Potentially customers don't like airlines which do not serve a route every day. On the other hand you can serve a route seven days a week with an aircraft and serve the same route a second (or third or fourth ...) time, but this time only some days. So for example you will have 10 flights a week, every day at least one and three on friday and two on monday. This would be ok for customers.4) Is there a limited amount of mechanics to do A- or B-Checks?
No, there are unlimited mechanics for every day and every time of a day. If you want to maintain all of your 150 aircraft from Saturday 12am to Sunday 12am, feel free to do so.5) Slot and runway fees are extremely expensive. How can I survive this?
Buying slots is a one time thing. You buy them and if you fly them in a route, you will never lose them. Also you never have to repurchase them, even an airport is moved to a newer one (for example Dallas Love Field to Dallas-Fort Worth).6) What happens when I base at an airport that is closed or replaced by some other airport later in the game?
That's no problem. The system will automatically move all of your aircraft and routes to the new airport. You just log in as normal and can do your normal AWS tasks, but you are at another airport - normally with much more demand everywhere and more slots, sometimes even extended opening hours.
An exception from this is Tokyo Haneda. If Tokyo Narita is opened, you will be automatically moved and you will lose nearly all of your domestic demand, while your international demand increases extremely. Due to the fact I don't would suggest some beginners or intermediates to base at Tokyo Haneda, there will be no further hints on this.7) Is it possible to open routes from another airport than mine and fly to an airport that's also not mine?
No, this is not possible. You might maybe open up to three base airports later in the game, these would be handled as your base airport (see Manual
on this), but normally it is not possible.8) Can I fly from my base airport to another airport and pick up some people and fly them to a third airport?
No, this is not possible in version 1.3. It was possible in previous versions and it will maybe possible with some restrictions somehow later again, but at the beginning of playing AirwaySim you can stick to routes out of your base airport.9) I'm using an aircraft that requires more runway length than my airport can afford. What to do?
At first, don't panic. The required runway is the one the aircraft needs to fly it's maximum range with the maximum on passengers. So if you plan to use some alternate seating, maybe with standard economy instead of high-density economy, or alternative if you fly to an airport that is near enough to your base to make your aircraft consume less fuel, you are fine.
If you absolutely must use an aircraft that requires a too long runway and if you absolutely must fly to some far away destination with as much passengers as possible, you can do the following thing:
Just build in some tech-stop in your route. It makes sense to use an airport on the shown flight path and make sure your tech-stop airport has a long enough runway.10) Does passenger demand on routes increase over time?
Yes, it does. And it only decreases after some very rare but world wide known events.11) Can I make a second or third tech-stop?
Yes, you can make two tech-stops. 12) Can I make some profit with ultra-long-haul (ULH) routes? Routes over around 7000nm I mean?
Hardly. You could make a bit profit if you own the aircraft, fuel prices aren't too high and if you can get a good amount of first class und business pax in there.
Normally, like in reality, ULH is more prestige for airlines with too much money and not a cash cow.13) Is it important to have different departing and arrival times on one route or can I simply copy the same route ten times and get all the people in my aircraft?
Simply copying routes is not going to work. You must at least have one hour difference between to departures to the same destination. If it's a very crowded route with over 4000 passengers a day, like for example Tokyo Haneda to Fukuoka, you can reduce this to 30 minutes.
Easiest way to avoid penalties due to this is common sense. You want to fly to a specific destination three times? Simply pick something like 05:30, 12:30 and 18:30 o'clock.