It’s still a grave sin. You will still have to go to Confession for these sins. Unless you’re going somewhere that there aren’t churches anywhere that are conceivable for you to go to.
Vacations can be extremely difficult to get to church, but you are still obliged to go.
We are obliged to attend Mass each Sunday and every other Holy Day of Obligation. Sometimes, though, we just can’t be there. One’s own sickness or the obligations to care for a sick person 1, having given birth within the past 6 weeks, dangerous weather (and other safety hazards), not being able to find a way there – life happens. There is no guilt in missing Mass if the circumstances are out of one’s control (mortal sin always requires not only grave matter and knowledge, but consent of the will).
Those who deliberately fail in this obligation commit grave sin” (#2181)
For it to be mortal it needs to be done with consent of the will.
Canon 1247
On Sundays and other holy days of obligation the faithful are bound to participate in the Mass; they are also to abstain from those labors and business concerns which impede the worship to be rendered to God, the joy which is proper to the Lord’s Day, or the proper relaxation of mind and body.
-fisheaters (
fisheaters.com/TLMmissingmass.html)
Canon 1248
- The precept of participating in the Mass is satisfied by assistance at a Mass which is celebrated anywhere in a Catholic rite either on the holy day or on the evening of the preceding day.
- If because of lack of a sacred minister or for other grave cause participation in the celebration of the Eucharist is impossible, it is specially recommended that the faithful take part in the liturgy of the word if it is celebrated in the parish church or in another sacred place according to the prescriptions of the diocesan bishop, or engage in prayer for an appropriate amount of time personally or in a family or, as occasion offers, in groups of families.
Since a “grave cause” is needed to excuse one from this obligation it would be a serious or mortal sin to willfully skip Mass on Sunday or a Holy Day of Obligation, as the Church has always taught. Reasons such as the necessity to work to support one’s family, child care, personal sickness or the care of the sick, necessary travel etc. would excuse a person on a particular occasions. Those who have continuing reason to be excused should consult their pastor.
-ewtn (
ewtn.com/expert/answers/sunday_mass.htm)
Previous quotes are for GangGreen
Personal opinion, he’s not missing it willfully he wants to go, mortal sin comes into play with full consent of the will. I would still talk to your pastor about what you can do and what he thinks is best.