1.旅途愉快英文:have a good trip; Have a nice trip; Bon voyage.
2.我祝愿你们两人旅途愉快。I wish you both a very good journey.
3.感谢您对我们工作的理解和支持,祝你们旅途愉快,一路平安。Thank you for your understanding and supporting on our work and we hope you have a pleasant journey.