Hanafi
The sources give no view for it here.
أثر السفر في مدة المسح
هل يطيل السفر مدة المسح على الخفين؟
Each school’s answer
In our wordsHanafi
Not stated in the sources
Maliki
Not stated in the sources
Shafi'i
Not stated in the sources
Hanbali
Not stated in the sources
The texts
امْتِدَادُ مُدَّةِ الْمَسْحِ عَلَى الْخُفَّيْنِ: ١٧ - ذَهَبَ جُمْهُورُ الْفُقَهَاءِ إِلَى أَنَّ السَّفَرَ يُطِيل مُدَّةَ الْمَسْحِ عَلَى الْخُفَّيْنِ إِلَى ثَلاَثَةِ أَيَّامٍ بِلَيَالِيهَا. وَتَفْصِيل ذَلِكَ فِي مُصْطَلَحِ: (مَسْحٌ عَلَى الْخُفَّيْنِ) .
«الموسوعة الفقهية الكويتية» (Kuwait) entry «عذر» vol. 30 p. 25
From the schools’ own books
Maliki
The sources give no view for it here.
Shafi'i
The sources give no view for it here.
Hanbali
The sources give no view for it here.
What is «in our words» is our standard wording; the books’ texts stay as they are.