Yes,World Altitude Record of an Air Breathing Plane is held by Alexandr Fedotov and was done in a special record version of the Mikoyan Gurevitch MiG-25 Foxbat, the E-266M. He climbed to 37,650m (123,520 ft) on August 31st, 1977. Until 2006, MiGFlug offered stratosphere flights in the MiG-25 Foxbat and was able to climb much higher, over 25km.
In some jets the pilot is in a pressurized suit. He could probably last a while in space.
A normal jet suit is a set of overalls with a lot of zippers and pockets, it provides no environmental support. A g suit goes over it, but thats just air bladders that can squeeze the lower body, it does nothing to the rest of the body.
Your question boils down to asking if someone in overalls and an oxygen mask can survive in a vacuum. Nope.
Imagine, by magic, that someone wont post a totally inane question here for 24 hours.
With the exception of U-2 (more appropriately called TR-1) and other no longer in service aircraft like the SR-71, aircraft pilots do not wear fully pressurized suits, and the vacuum of space would kill them.
1) Its airplanes. One word.
2) No, a combat flight suit that a pilot wears is not a fully pressurized, airtight space suit and cannot it protect from the vacuum of space. The lungs need air pressure in order to absorb oxygen. The pilot would lose consciousness within about 15 seconds and within 2 minutes his organs would shut down and death would quickly follow. Want to know exactly how? Read the gruesome details: https://www.space.com/30066-what-happens...