Signum Aviation is an international trip services provider with offices in Seattle, WA and Manchester, UK, providing flight planning, handling, obtaining permits / slots, and operational support for Part 91 flight departments. Signum Aviation offers its clients award winning customer service and a global network of support, acting as a force multiplier for operators going overseas. Recognized at the 2019 Air Transport Awards with the “Best Business Flight Planning and Operations Support Award,” Signum Aviation is ready to meet your flight department’s needs today. As a CAA member, please consider using Signum Aviation when traveling outside of the United States. 

Contact Signum Aviation at:


Free LOA Letter Package:

To better support the CAA members’ international travel requirements, we are offering free
LOA flight plan sample packages to support your applications to the FAA.
Signum will provide this service free of charge once you have on-boarded your aircraft with
us (also free of charge) by completing the on-board application.

E-mail your on-boarding document and a summary of your requirements for the sample flight package to [email protected]

"The flight planning services provided by Signum were terrific! As a small flight department, I was reluctant to try a new flight planning service but I am glad I did! Kyle and the staff at Signum could not have been more helpful or professional. From the initial contact, regular check-ins and follow up, I was very impressed by the service, professionalism and thoroughness.  If you are in need of flight planning, overflight permit and/or handling services contact Signum- you will not be disappointed!"

Ford Peterson, Chief Pilot
Bernatello's Foods

“First of all, a huge thank you for your assistance during our trip to Cancun, Mexico recently. A career in the airlines preceded by many, many years of single pilot ops cannot prepare one for the potential bureaucratic nightmare that is exit and entry to and from the USA to Mexico. Cancun and Tulum in particular are truly beautiful places and we would not have made it without the support from your flight ops team. After numerous last-minute changes to our itinerary including travel dates and ports of entry, all paperwork arrived at the right time and place and was complete in every detail. Transit through the FBO in Cancun was seamless (which is more than can be said for the times I operated commercially through there). Re-entry to the USA was equally trouble free with US Customs and Border Patrol officers in possession of all the paperwork to actually help us!! I had previously wondered what the experience of flying independently, without a Company flight operations department to back me up, would be like. Answer, it’s a breeze with you guys there 24/7, at the end of the phone or by email. And all of this amid the COVID complication. I’ll be in touch about our trip back to the UK in due course, in the meantime, please keep up the good work.”
Andy Ridings, Owner/Pilot