Start with this Du'a
Returning from a journey: Ayibuna ta'ibuna
يُكَبِّرُ عَلَى كُلِّ شَرَفٍ ثَلاَثَ تَكْبِيرَاتٍ ثُمَّ يَقُولُ: لاَ إِلَهَ إِلاَّ اللَّهُ وَحْدَهُ لاَ شَرِيكَ لَهُ، لَهُ الْمُلْكُ، وَلَهُ الْحَمْدُ، وَهُوَ عَلَى كُلِّ شَيْءٍ قَدِيرٌ، آيِبُونَ، تَائِبُونَ، عَابِدُونَ، لِرَبِّنا حَامِدُونَ، صَدَقَ اللَّهُ وَعْدَهُ، وَنَصَرَ عَبْدَهُ، وَهَزَمَ الْأَحْزابَ وَحْدَهُ
Yukabbiru 'ala kulli sharafin thalatha takbirat, thumma yaqul: La ilaha illa-llahu wahdahu la sharika lah, lahu-l-mulku, wa lahu-l-hamdu, wa huwa 'ala kulli shay'in qadir. Ayibuna, ta'ibuna, 'abiduna, li-Rabbina hamidun. Sadaqa-llahu wa'dah, wa nasara 'abdah, wa hazama-l-ahzaba wahdah
“He would say Allahu Akbar three times on every high place, then say: None has the right to be worshipped but Allah alone, without partner. His is the dominion and His is the praise, and He has power over all things. We are returning, repenting, worshipping, and praising our Lord. Allah fulfilled His promise, gave victory to His servant, and alone defeated the confederates.”
Sahih al-Bukhari 1797, Sahih Muslim 1344
The Prophet ﷺ said this on the way home from Hajj, Umrah or an expedition.