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.