This is the list of episodes. They are three different versions which are all included.
Disney aired episodes in an irregular order. Disney seemed to prefer to air the episodes with the American guest stars early in the season despite the fact that the order of the episode then made no sense.
None of the orders really makes complete sense to me. I've come up with a slightly different episode order for a few of the seasons and the list can be found at the bottom of this page.
Sullivan Entertainment's Version (according to the backs of the DVD)
Season One
The Journey Begins
The Story Girl Earns Her Name:
The Quarantine at Alexander Abraham's
Secrets and True Love (Materializing of Duncan)
Old Lady Lloyd {aka Song in the Night}
Proof of the Pudding
Aunt Abigail's Beau:
Malcolm and the Baby
Conversions
Felicity's Challenge
The Hope Chest of Arabella King
The Witch of Avonlea
Nothing Endures But Change
Season Two
Sara's Homecoming
How Kissing Was Discovered:
Aunt Hetty's Ordeal
Of Corsets and Secrets and True True Love
Old Quarrels, Old Love
May the Best Man Win
Family Rivalry
Sea Ghost
All That Glitters
Dreamer of Dreams
It's Just a Stage
A Mother's Love
Misfits and Miracles
Season Three
The Ties That Bind
Another Point of View {aka Facts and Fiction}
Felix and Blackie
But When She Was Bad... She Was Horrid (part 1)
But When She Was Bad... She Was Horrid (part 2)
Aunt Janet Rebels
Dark and Stormy Night
Friends and Relations
Vows of Silence {aka True Confessions}
After the Honeymoon
The Calamitous Courting of Hetty King
High Society
Old Friends, Old Wounds
Season Four
Tug of War: {aka Where There's a Will}
The Lady and the Blade
Incident at Vernon River
Evelyn
Moving On {aka Sara and the Marshall}
Boys Will Be Boys
The Dinner {aka Felicity's Grand Design}
Heirs and Graces
Hearts and Flowers {aka Servant of Two Masters}
Felicity's Perfect Beau
The Disappearance
Home Movie
Hearth and Home
Season Five
Fathers and Sons
Memento Mori:
Modern Times
A Friend in Need
Strictly Melodrama
The Great Race
Stranger in the Night
Someone to Believe In
Thursday's Child
Best Laid Plans
Otherwise Engaged
Enter Prince Charming
The Minister's Wife
Season Six
The Return of Gus Pike
Lonely Hearts
Christmas in June
Fools and Kings
Comings and Goings
The Trouble with Davey
Great Expectations
A Fox Tale
The More Things Change
Home is Where the Heart Is
What a Tangled Web We Weave
A Time to Every Purpose
Homecoming
Season Seven
Out of the Ashes
Love May Be Blind... But the Neighbors Ain't
Davey and the Mermaid
Woman of Importance
Secrets and Sacrifices
Ah... Sweet Mystery of Life
King of the Great White Way
Total Eclipse
From Away
After the Ball is Over
Return to Me
The Last Hurrah
So Dear to My Heart
Happy Christmas Miss King (aka An Avonlea Christmas)
CBC Version
Season One
The Journey Begins
The Story Girl Earns Her Name:
The Quarantine at Alexander Abraham's
The Materializing of Duncan McTavish
Old Lady Lloyd {aka Song in the Night}
Proof of the Pudding
Conversions
Aunt Abigail's Beau
Malcolm and the Baby
Felicity's Challenge
The Witch of Avonlea
The Hope Chest of Arabella King:
Nothing Endures But Change
Season Two
Sara's Homecoming:
How Kissing Was Discovered:
Aunt Hetty's Ordeal:
Of Corsets and Secrets and True True Love
Old Quarrels, Old Love
May the Best Man Win
Family Rivalry
Sea Ghost
All That Glitters
Dreamer of Dreams
It's Just a Stage
A Mother's Love
Misfits and Miracles
Season Three
The Ties That Bind
Felix and Blackie
Another Point of View {aka Facts and Fiction}
But When She Was Bad... She Was Horrid (part 1)
But When She Was Bad... She Was Horrid (part 2)
Aunt Janet Rebels
A Dark and Stormy Night
Friends and Relations
Vows of Silence {aka True Confessions}
After the Honeymoon
High Society
The Calamitous Courting of Hetty King
Old Friends, Old Wounds
Season Four
Tug of War: {aka Where There's a Will}
The Lady and the Blade
Incident at Vernon River
Boys Will Be Boys
Moving On {aka Sara and the Marshall}
Evelyn
The Dinner {aka Felicity's Grand Design}
Heirs and Graces
Hearts and Flowers {aka Servant of Two Masters}
Felicity's Perfect Beau
The Disappearance
Home Movie
Hearth and Home
Season Five
Fathers and Sons
Memento Mori
Modern Times
A Friend in Need
Strictly Melodrama
The Great Race
Stranger in the Night
Someone to Believe In
Thursday's Child
Best Laid Plans
Otherwise Engaged
Enter Prince Charming
The Minister's Wife
Season Six
The Return of Gus Pike
Lonely Hearts
Christmas in June
Fools and Kings
Comings and Goings
The Trouble with Davey
Great Expectations
A Fox Tale
The More Things Change
Home Is Where the Heart Is
What a Tangled Web We Weave (aka The Daring Deception of Maggie MacPhee)
A Time To Every Purpose {aka The Calling}
Homecoming
Season Seven
Out of the Ashes
Love May Be Blind... but Neighbors Ain't
Davey and the Mermaid:
Woman of Importance
Secrets and Sacrifices
Ah... Sweet Mystery of Life
King of the Great White Way
Total Eclipse
From Away:
After the Ball is Over:
Return to Me
The Last Hurrah
So Dear to My Heart
Happy Christmas Miss King (aka An Avonlea Christmas)
DISNEY VERSION
Season One
The Journey Begins
The Story Girl Earns Her Name
Proof of the Pudding
The Quarantine at Alexander Abraham's
Aunt Abigail's Beau
The Witch of Avonlea
Malcolm and the Baby
Conversions
Felicity's Challenge
The Hope Chest of Arabella King
The Materializing of Duncan McTavish
Nothing Endures But Change
Song of the Night (aka Old Lady Lloyd)
Season Two
How Kissing Was Discovered
Aunt Hetty's Ordeal
Of Corsets and Secrets and True True Love
Sara's Homecoming
A Mother's Love
Old Quarrels, Old Love
Sea Ghost
Family Rivalry
May the Best Man Win
All That Glitters
It's Just a Stage
Dreamer of Dreams
Misfits and Miracles
Season Three
Sister of the Bride (aka The Ties That Bind)
But When She Was Bad... She Was Horrid part one
But When She Was Bad... She Was Horrid part two
Felix and Blackie
A Dark and Stormy Night
Facts and Fiction (aka Another Point of View)
True Confessions (aka Vows of Silence)
Friends and Relations
Aunt Janet's Rebellion (aka Aunt Janet Rebels)
After the Honeymoon
High Society
Old Friends, Old Wounds
The Calamitous Courting of Hetty King
Season Four
Tug of War
The Lady and the Blade
Incident at Vernon River
Sara and the Marshall (aka Moving On)
Boys Will Be Boys
Evelyn
Felicity's Grand Design (aka The Dinner)
Heirs and Graces
Hearts and Flowers
Felicity's Perfect Beau
The Disappearance
Jasper's Home Movie (aka Home Movie)
Hearth and Home
Season Five
Memento Mori:
Modern Times
Fathers and Sons
A Friend in Need
Stranger in the Night
Enter Prince Charming
The Minister's Wife
The Great Race
Someone to Believe In
Strictly Melodrama
Thursday's Child
Best Laid Plans
Otherwise Engaged
Season Six
Lonely Hearts
Comings and Goings
The Return of Gus Pike:
Christmas in June
The Trouble With Davey
Great Expectations
What a Tangled Web We Weave
A Fox Tale
The More Things Change
Fools and Kings
Home is Where the Heart Is
The Calling (aka A Time to Every Purpose)
Homecoming
Season Seven
Out of the Ashes
Love May Be Blind,,, but the Neighbors Ain't
Davey and the Mermaid
Woman of Importance
King of the Great White Way
Total Eclipse
Secrets and Sacrifices
From Away
Ah... Sweet Mystery of Life
After the Ball is Over
Return to Me
The Last Hurrah
So Dear to My Heart
Happy Christmas Miss King (aka An Avonlea Christmas)
Avonlea Vignettes
Season One
The Journey Begins
The Story Girl Earns Her Name
The Quarantine at Alexander Abraham's
Secrets and True Love (Materializing of Duncan)
Old Lady Lloyd {aka Song in the Night}
Proof of the Pudding
Conversions
Aunt Abigail's Beau
Malcolm and the Baby
Felicity's Challenge
The Hope Chest of Arabella King
The Witch of Avonlea
Nothing Endures But Change
Season Two
I believe the Sullivan order to be accurate.
Season Three
This season needed some work. I think though it was corrected by moving When She Was Bad after Ties that Bind. Felix and Blackie has to go before Another Point of View because Alec is seen riding Caeser in Another Point of View. Though what's interesting is that Hetty uses a horse that looks a lot like Caeser in Ties that Bind.
The Ties That Bind
But When She Was Bad... She Was Horrid (part 1)
But When She Was Bad... She Was Horrid (part 2)
Felix and Blackie
Another Point of View {aka Facts and Fiction}
Aunt Janet Rebels
A Dark and Stormy Night
Friends and Relations
Vows of Silence {aka True Confessions}
After the Honeymoon
High Society
The Calamitous Courting of Hetty King
Old Friends, Old Wounds
Season Four
Season four seems to make sense. Nothing goofy seems to pop out, but then the majority of the episodes take place in winter, so it'd be harder to tell by looking at the scenery.
Season Five
Fathers and Sons
Memento Mori
Modern Times
A Friend in Need
The Great Race
Stranger in the Night
Someone to Believe In
Strictly Melodrama
Thursday's Child
Best Laid Plans
Otherwise Engaged
Enter Prince Charming
The Minister's Wife
Season Six
I still struggle a bit with having Comings and Goings before Lonely Hearts. The weather appears to be warmer in Lonely Hearts than it seems to be in Comings and Goings, but Felix's feelings about Izzy would be a bit wacky if Lonely Hearts were first.
The Return of Gus Pike
Christmas in June
Comings and Goings
Lonely Hearts
The Trouble with Davey
Great Expectations
A Fox Tale
Fools and Kings
The More Things Change
Home Is Where the Heart Is
What a Tangled Web We Weave (aka The Daring Deception of Maggie MacPhee)
A Time To Every Purpose {aka The Calling}
Homecoming
Season Seven
Out of the Ashes
Love May Be Blind... but Neighbors Ain't
Davey and the Mermaid
Woman of Importance
Secrets and Sacrifices
King of the Great White Way
Total Eclipse
Ah... Sweet Mystery of Life
From Away
After the Ball is Over
Return to Me
The Last Hurrah
So Dear to My Heart