Angels are to be honoured but not worshipped

Revelation 19:10 At this I fell at his feet to worship him. But he said to me, "Don't do that! I am a fellow servant with you and with your brothers and sisters who hold to the testimony of Jesus. Worship God! For it is the Spirit of prophecy who bears testimony to Jesus." 

Angels are wonderful creatures and it is tempting, if one sees them in all their glory, to worship them but they are not to be worshipped. Only God is to be worshipped.

Angels come with bad news from God

Genesis 19:12, 13 The two men said to Lot, "Do you have anyone else here--sons-in-law, sons or daughters, or anyone else in the city who belongs to you? Get them out of here, because we are going to destroy this place. The outcry to the LORD against its people is so great that he has sent us to destroy it."
The angels come not only bearing good news but bad news too as in the story of Sodom and Gomorrah.

Angels come with good news from God

Genesis 19:9, 10a ... "Where is your wife Sarah?" they asked him. "There, in the tent," he said. Then one of them said, "I will surely return to you about this time next year, and Sarah your wife will have a son."

Luke 1:11-17 Then an angel of the Lord appeared to him, standing at the right side of the altar of incense. When Zechariah saw him, he was startled and was gripped with fear. But the angel said to him: "Do not be afraid, Zechariah; your prayer has been heard. Your wife Elizabeth will bear you a son, and you are to call him John. He will be a joy and delight to you, and many will rejoice because of his birth, for he will be great in the sight of the Lord. He is never to take wine or other fermented drink, and he will be filled with the Holy Spirit even before he is born. He will bring back many of the people of Israel to the Lord their God. And he will go on before the Lord, in the spirit and power of Elijah, to turn the hearts of the parents to their children and the disobedient to the wisdom of the righteous - to make ready a people prepared for the Lord."

Luke 1:19 The angel said to him, "I am Gabriel. I stand in the presence of God, and I have been sent to speak to you and to tell you this good news.

Luke 1:26-33 In the sixth month of Elizabeth's pregnancy, God sent the angel Gabriel to Nazareth, a town in Galilee, to a virgin pledged to be married to a man named Joseph, a descendant of David. The virgin's name was Mary. The angel went to her and said, "Greetings, you who are highly favored! The Lord is with you." Mary was greatly troubled at his words and wondered what kind of greeting this might be. But the angel said to her, "Do not be afraid, Mary; you have found favor with God. You will conceive and give birth to a son, and you are to call him Jesus. He will be great and will be called the Son of the Most High. The Lord God will give him the throne of his father David, and he will reign over Jacob's descendants forever; his kingdom will never end."

Three obvious examples are the announcements of the births of Isaac, John adn Jesus. Perhasp that of Samson in Judges 13 could be added.

Angels (messengers) bring messages from God and must be honoured

Genesis 18:2 Abraham looked up and saw three men standing nearby. When he saw them, he hurried from the entrance of his tent to meet them and bowed low to the ground.

In one of the earliest references to angels in the Bible they are spoken of as men, as that is what they looked like. In Genesis 18:13, 14, 17ff and especially 19:1 it becomes clear that these are more than men, however. Whether we understand the three as God and two angels or simply three angels, here are messengers from heaven, bringing good news and bad to Abraham.

Angels always obey God

Psalm 103:20, 21 Praise the LORD, you his angels, you mighty ones who do his bidding, who obey his word. Praise the LORD, all his heavenly hosts, you his servants who do his will.

Instinctively and immediately angels always obey God's commands. This is the main basis for the part of the Lord's prayer wherewe are to ask that God's will be done on earth as in heaven.

Angels are capable of swift flight

Daniel 9:21 ... while I was still in prayer, Gabriel, the man I had seen in the earlier vision, came to me in swift flight about the time of the evening sacrifice.

Swift flight is no doubt a metaphor of some sort, a theriomorph of some description. What it identifies is the ability of Gabriel and other angels, no doubt, to travel speedily. Without the aid of machines or other helps of that sort they are able to cover huge distances in a short time.
This would seem to fit in with
Revelation 14:6 Then I saw another angel flying in midair, and he had the eternal gospel to proclaim to those who live on the earth - to every nation, tribe, language and people. 

Also Psalm 104:4 (quoted in Hebrews 1:14) He makes winds his messengers, flames of fire his servants.

Angels are holy but they lack the perfection found in God

Job 14:17, 18  If God places no trust in his servants, if he charges his angels with error, how much more those who live in houses of clay, whose foundations are in the dust, who are crushed more readily than a moth! 

Job 15:15, 16 If God places no trust in his holy ones, if even the heavens are not pure in his eyes, how much less mortals, who are vile and corrupt, who drink up evil like water! 

These parallel verses are spoken by Eliphaz the Temanite who does say things that are incorrect and so these verses may be unreliable. It may be wiser to say that Eliphaz does state a truth here and that is that although there is a holiness about the angels that is far above the greatest examples of holiness among men, nevertheless it is less than the holiness of God. He can discern an imperfection even in the holy angels.