I'll be coming in from BKK to the Udon airport. First time there so curious if there are metered taxis or what for transportation into Udon Thani. What should be the reasonable approximate expectation for taxi fare from the airport to Top Mansion hotel?

Thanks
Jim

I would estimate about 200-250B in a tuk tuk.

Alternatively, look for the Charoensri (Centara) hotel van. If they're not full, they'll take you for 150B or 200B. If you ask nicely, they might take you down TM road.

As far as I am aware taxis waiting for hire (& tuk tuks) are NOT allowed at the airport. There is a service that is, basically. a mininbus that does a circuit of Udon dropping off at hotels. Tickets are available just before you exit the airport - I understand that the ticket price is pretty minimal.
As Tex says many of the larger hotels have a mini bus service & it is possible to avail yourself of those for a few baht to the driver. Charoensri Grand is probably the nearest to Top Mansion that does.
Top Mansion do not have their own mini bus service. However I am sure if you contacted them then they would arrange a pick up for you - Tex is pretty correct about the likely charge!!

Thanks for the information. Much appreciated.
Jim